"Respondents reported injecting a median of 60 times per month, visiting the syringe exchange program a median of 4 times per month, and obtaining a median of 10 syringes per transaction; more than one in four reported reusing syringes. Fifty-four percent of participants reported receiving fewer syringes than their number of injections per month. Receiving an inadequate number of syringes was more frequently reported by younger and homeless injectors, and by those who reported public injecting in the past month."

Source

Daliah I Heller, Denise Paone, Anne Siegler and Adam Karpati, "The syringe gap: an assessment of sterile syringe need and acquisition among syringe exchange program participants in New York City," Harm Reduction Journal (London, United Kingdom: January 2009), p. 1.
http://www.harmreductionjourn…