"A total of 2,889 HIV infections were reported to the RKI [Robert Koch Institute] for the year 2011. This translates to a nationwide incidence of 3.5 cases per 100,000 population. The total number of newly diagnosed HIV infections thus hardly declined in comparison to 2010 (2,939). Information about the route of transmission was available for 77% of newly diagnosed HIV infections. The group of persons (n=90) who likely contracted their HIV infection through intravenous drug use represented the third largest group (4%).
"Amongst those intravenous drug users newly diagnosed with HIV, information on their origin was lacking on 19% of the reports. 43% of persons newly diagnosed with HIV originated from Germany, 38% from abroad. Of the intravenous drug users from other countries, probably around 38% had contracted the infection in Germany, the same number in Eastern Europe. At least two thirds of the newly diagnosed HIV infections amongst intravenous drug users occurred in Germany, most of the others in other European countries (24%) – in particular Eastern Europe (17%) (RKI 2012a, b)."

Source

German Reference Centre for the European Monitoring Centre for Drugs and Drug Addiction (Deutsche Beobachtungsstelle fuer Drogen und Drogensucht (DBDD)), "2012 National Report to the EMCDDA by the Reitox National Focal Point: Germany: New Developments, Trends and In-Depth Information on Selected Issues - Drug Situation 2011/2012" (Munich, Germany: DBDD, Oct. 2012), p. 132.
http://www.emcdda.europa.eu/h…
http://www.emcdda.europa.eu/a…