100,000. There were 238 homicide incidents in Australia in 2013-14 compared with 307 in 1989–90. From the National Australian Homicide Monitoring program report 2012: "The homicide rate has continued to decrease each year, since 1989-90. The periods 2010–2011 and 2011–2012 are the lowest homicide rate since data collection began in 1989”. Prison statistics Prisoner statistics 2000–present can be found on the Australian Bureau of Statistics page for 4517.0 - Prisoners in Australia. 2018 Between 2017 and 2018 the national imprisonment rate increased by 3% from 216 to 221 prisoners per 100,000 adult population. In 2018, adult prisoner numbers were up by 4% on the previous year, with female prisoner numbers increasing at a faster rate than male prisoners and with drug offences responsible for the highest rise by category. There were rises in all states except for South Australia. The breakdown was: acts intended to cause injury (9,659 prisoners or 22%); illicit drug offences (6,779 prisoners or 16%); and sexual assault and related offences (5,283 prisoners or 12%). Males accounted for 92% of all prisoners. Aboriginal and Torres Strait Islander prisoners accounted for over a quarter of the total Australian prisoner population. Deaths in custody Research from the Australian Institute of Criminology showed that from 1990 until the middle of 2011, 40 percent of people who were fatally shot by police were suffering from a mental illness. In NSW, the fatalities included Adam Salter (shot dead in Sydney in 2009); Elijah Holcombe (shot dead in Armidale in 2009); and Roni Levi (shot dead on Bondi Beach in 1997). In Victoria, the fatalities included the 2008 shooting death of Tyler Cassidy. At age 15, Cassidy is believed to be the youngest person ever shot dead by police in Australia. Indigenous Australians and crime Indigenous Australians are both convicted of crimes and imprisoned at a disproportionately high rate in Australia. The issue is a complex one, to which federal and state governments as well as Indigenous groups have responded with various analyses and numerous programs and measures. Many sources report over-representation of Indigenous offenders at all stages of the criminal justice system. Gun control laws The gun buy-back program which was implemented in 1996, purchased and destroyed mostly semi-automatic and pump action firearms. Relatively frequent mass murders committed in the United States serve to re-ignite the debate on gun control laws from time to time, and Australia's gun control laws have been