" In 2009–10, cannabis accounted for the highest number of drug-related arrests. There were 57,170 arrests involving cannabis in 2009–10, an increase of three percent from 2008–09, but an overall decrease of 17 percent from the number of arrests recorded in 1996–97.
" The number of arrests for heroin peaked in 1998–99 with 14,341 arrests. This number fell considerably between 1999–2000 and 2001–02 before declining fairly consistently over the next 10 year period. In 2009–10, 2,767 arrests were made that involved heroin—an 81 percent decrease in arrests over that time.
" In 1996–97, the number of arrests involving amphetamines was slightly below that of arrests involving ‘other’ drugs. Since then, however, arrests involving amphetamines have generally increased more than those involving other drugs, although this difference diminished in 2010, with only 3,893 more amphetamine arrests than arrests for other drugs. Overall, however, there has been a 258 percent increase in the number of amphetamine-related arrests since 1996–97.
" In 2009–10, the number of cocaine arrests increased by 47 percent, rising from 848 in 2008–09 to 1,244. Despite this, the overall number of cocaine arrests remained lower than for any other drug type throughout the period.
" Drug arrests involving a consumer were far more common across all drug types than those involving a provider. The highest proportion of those arrested (both consumers and providers) were for crimes involving cannabis (86%).
" Providers accounted for 32 percent of cocaine-related arrests, 31 percent of heroin-related arrests and 28 and 24 percent of amphetamine and other drug-related offences, respectively."
"Australian Crime: Facts & Figures: 2011," ISSN 1836-2249 (Canberra: Australian Institute of Criminology, March 2012), pp. 40-41.