Prevalence of Heroin and Cocaine Use in Switzerland: "According to what is currently known, there are only a small number of dependent drug users who exclusively consume cocaine; most of those who are dependent on drugs consume heroin first and foremost. However, cocaine is increasingly consumed in addition to heroin.
Prevalence of Cocaine Use in Australia: "There was a significant increase in the proportion of people who were offered or had the opportunity to use cocaine in 2013 (from 4.4% in 2010 to 5.2%). However, there was no change in the proportion using cocaine in the previous 12 months (2.1%) (online tables 5.3 and 5.12). Recent users also used cocaine less often in 2013, with a lower proportion using it every few months (from 26% to 18.0%) and a higher proportion using it once or twice a year from 61% to 71% (Online Table 5.11).
Crack Smoking and Risk of HIV
Estimated Worldwide Cocaine Seizures According to UNODC: "Data suggest that the global cocaine interception rate, based on cocaine production estimates and quantities of cocaine seized, reached a level of between 43 and 68 per cent in 2014."
In 2015, among people aged 12 and older in the United States:
38,744,000 people had used cocaine at least once in their lifetime.
4,828,000 people had used cocaine in the past year.
1,876,000 people had used cocaine in the past month.
9,035,000 people had used crack at least once in their lifetime.
833,000 people had used crack in the past year.
394,000 people had used crack in the past month.
"Crack cocaine use spread rapidly from the early to mid-1980s. Still, among 12th graders, the use of crack remained relatively low during this period (3.9% annual prevalence in 1987). Clearly, crack had quickly attained a reputation as a dangerous drug, and by the time of our first measurement of perceived risk in 1987, it was seen as the most dangerous of all drugs. Annual prevalence dropped sharply in the next few years, reaching 1.5% by 1991, where it remained through 1993.
Physiological and Psychological Effects of Cocaine
Chart Comparing Addictive Qualities of Popular Drugs