The CDC’s National HIV Behavioral Surveillance consistently surveys gay and bisexual men about meth use, which is determined via a study among gay and bi men done every 3-4 years in cities with high rates of HIV/AIDS, including San Francisco, Los Angeles, and New York.
Meth use among the men in NYC surveyed dropped from 13.8 percent to 5.8 percent from 2004-2008, and down even further to 4.3 percent by 2011.
However, the use more than doubled from 2011-2014, all the way up to 9.2 percent.
According to the survey, meth use has dropped sharply in San Francisco, but they have more reported meth users than New York City — 13.1 percent to 9.2 percent.
More information on the report can be found here.