to peak in 1962 at 108,400, before falling back for a few years. The all-time peak, of 203,000, was reached in 1977. By the time
the regime collapsed the "IM headcount" number had stabilised at, on these figures, around 175,000. The Stasi network of Informal Collaborators (IMs) covered all sections of the population in the
Democratic Republic. The network provided crucial support to the country's elaborate surveillance system, and it made possible the monitoring of groups to which an identifiable
Stasi officer could never have gained more direct access. There were IMs in many dissident groups and organisations, notably in artistic and church circles, so that the state was informed in particular detail about individuals defined in the official Stasi jargon as "enemy-negative persons" (
"feindlich-negativer Personen") During its lifetime the Stasi had around 624,000 Informal collaborators. IM numbers rose most steeply at times of societal crises, such as the aftermath of the
1953 uprising and the construction of the
Berlin Wall (which began, with the official closing of the border surrounding
West Berlin, in August 1961). They fell back a little in the mid-1960s for the initial phase of the period of
reduced east-west tensions between the two Germanys associated with the time in office, first as Foreign Minister and then as Chancellor, of
Willy Brandt, before climbing steeply through the early 1970s to peak at a little above 200,000 during the mid-1970s. The gentle decline in the overall number of the Informal collaborators for several years in the later 1970s is associated with new guidelines, intended to increase their professionalism. By the end of 1988 the number had declined to 173,081. A more recently published study from
Helmut Müller-Enbergs, published in 2010, put the number of Informal Collaborators in 1989 at 189,000.
The numbers challenged A younger researcher on the subject,
East Berlin born historian
Ilko-Sascha Kowalczuk, questioned this figure in 2013, but without providing any similarly careful estimate of his own as to the number of IMs in 1988/89. There is a suggestion that Müller-Enbergs' higher figure includes people who operated under more than one cover name and in more than one IM category, leading to some double counting in his revised figure. Another consideration is that the
Stasi data include many people who never actually reported anything to them. The Stasi themselves archived the records of nearly 10,000 inactive IMs in 1987. In 1988 the Stasi were using, internally, the much lower figure of 110,000.
Kowalczuk also questioned the extrapolated figure for IMs based outside
the country.
A challenge challenged Kowalczuks own figures, appearing in his book
Stasi konkret (2013), Kowalczuk's employers at the
Federal Commission for Stasi Records (BStU) in effect later distanced themselves from his figures, and an (in other respects unimportant) application by the
Federal (national) government later in 2013 also implied rejection of Kowalczuk's position.
Informal collaborators in 1989 The BStU continues to accept the
Müller-Enbergs figure of 189,000 IMs, including more than 10,000 in the category "
Gesellschaftlicher Mitarbeiter Sicherheit" (see #Categories
below). The BStU believes that between 3,000 and 3,500 of these Stasi IMs were operating in
West Germany and
West Berlin, and they reckon that 1,550 of
these were working for the
HVA (effectively the "foreign" division of the intelligence service). It is in any event clear, as the BStU has repeatedly pointed out, that the term "Informal collaborator" (
"Inoffizieller Mitarbeiter" /
"Informeller Mitarbeiter"’ /
"IM") was not always precisely defined, and that very careful investigation is needed in order to prove any individual case on order that the individual responsibility, or where appropriate the guilt, of any one person may be determined. The importance of treating each case individually is as important in serving the public just as for research purposes. Some have nevertheless claimed that there are essential differences between the two. The debate about numbers and the ensuing clarifications provided by the
BStU have in the end provided some reassurance about the soundness of the 189,000 figure.
Other Stasi informants There is also evidence that the Stasi had significant numbers of informants in addition to the IMs. In the residential areas the
Stasi relied on "Information people" (
"Auskunftspersonen " / AKPs), for information on neighbours. These were informants who in most circumstances would not themselves have been listed as IMs, and whose information gathering would mostly have been controlled by senior Stasi officers. They would have sought to conceal the true basis for their "curiosity", as representing, for instance, the local council, the military or the tax office in order to get their target-interlocutors talking. Details of these AKPs, including the extent of their willingness to talk, were documented in the Stasi files. Sample-based analysis of these Stasi records in
Rostock and
Saalfeld shows that approximately 18% and 5.9% of the populations, respectively, were assessed as AKPs who were, for the most part, ready to talk. That means that in these places the IMs were outnumbered many times over by these AKPs. In
Karl-Marx-Stadt (the name of which has since reverted to Chemnitz) the Stasi had contacts with people they defined as "good people" ("gute Menschen"), people ready to be helpful to them. In business and workplaces, state institutions and social organisations, the Stasi worked with "official" partners. Usually these were people in key positions, which normally meant leadership positions. Most frequently these were in workplaces, where security issues, mostly personnel issues could be clarified. These "official" partners were expected not merely to provide information, but also to accept advice from them, and to respect instructions to replace personnel. These contacts could not be considered "unofficial" but they mostly operated in an informal manner. Conversations with "official" Stasi partners could fatefully affect peoples' lives, leading to career difficulties or travel restrictions. The Stasi preferred "official" partners to be members of the
nomenklatura. These were people with close ties to the ruling
SED (party), and they were the people who exercised the real power in the East German dictatorship.
Concentration and geographical distribution The concentration of Informal collaborators varied considerably, ranging from about one IM for every 80 of the population up to about 160. The greatest concentrations were in
Cottbus,
Schwerin and
Magdeburg while the lowest were in
Berlin,
Halle and
Leipzig. The IM network was almost exclusively a domestic operation. Little information survives on IM activities abroad. It is estimated that the
Stasi employed 3,000 (including
HVA agents) of these informants in
West Germany, and between 300 and 400 in other western countries. During the entire period of the Stasi's existence it is estimated that approximately 12,000
West Germans worked for the Stasi. Many of these were former
East Germans whom the Stasi mandated to relocate to the west.
Genders, party affiliation and age profiles IMs were predominantly male (83% in East Germany and 73% in West Germany). Most were members of the ruling East German
SED (roughly 5% of the party's members were also IMs). The 25–40 age group was particularly well represented (between 30 and 40% of IMs fell within this age range as compared with only 24% in the population as a whole), with the under-25s and those of pensionable age correspondingly under represented. ==Activities==