"During 2007-09, about 4 in 10 state prisoners (42%) and sentenced jail inmates (37%) said they used drugs at the time of the offense for which they were currently incarcerated (table 6). Among prisoners, 22% reported marijuana/hashish use at time of the offense, 16% reported cocaine/crack use, 11% reported stimulant use, and 7% reported heroin/opiate use. Among sentenced jail inmates, 19% reported using marijuana/hashish at time of the offense, 13% reported cocaine/crack use, and 8% reported stimulant and heroin/opiate use."
"About 21% each of state prisoners and sentenced jail inmates said their most serious current offense was committed to get money for drugs or to obtain drugs (table 7). A larger percentage of prisoners (39%) and jail inmates (37%) held for property offenses said they committed the crime for money for drugs or drugs than other offense types. Nearly a third of drug offenders (30% of state prisoners and 29% of jail inmates) said they committed the offense to get drugs or money for drugs.
"Although no amount of policy analysis can resolve disagreements about how much punishment drug offenses deserve, research does make clear that some strategies for reducing drug use and crime are more effective than others and that imprisonment ranks near the bottom of that list. And surveys have found strong public support for changing how states and the federal government respond to drug crimes.
"One primary reason for sentencing an offender to prison is deterrence—conveying the message that losing one’s freedom is not worth whatever one gains from committing a crime. If imprisonment were an effective deterrent to drug use and crime, then, all other things being equal, the extent to which a state sends drug offenders to prison should be correlated with certain drug-related problems in that state. The theory of deterrence would suggest, for instance, that states with higher rates of drug imprisonment would experience lower rates of drug use among their residents.
Prevalence of Marijuana Use in Lifetime, Past Year, and Past Month among Persons in the US Aged 12 or Older, by Demographic Characteristics: Number in Thousands
"Among 12th graders, the highest noncontinuation rate is observed for inhalants (69%), followed by MDMA (ecstasy, Molly) and crystal methamphetamine (ice) (both at 47%). Many inhalants are used primarily at a younger age, and use is often not continued into 12th grade. The rank ordering for noncontinuation of other drugs is as follows: methamphetamine, heroin, crack, narcotics other than heroin, tranquilizers, amphetamines, steroids, sedatives (barbiturates), cocaine, cocaine other than crack, hallucinogens, and LSD (all between 34% and 44%).
Illegal Drug Use and Marijuana Use in Lifetime, Past Year, and Past Month among Persons Aged 12 and Older in the US by Age, Gender, and Race/Ethnicity, 2015 and 2016
"26.4% of Irish adults aged 15 years or older report using an illegal drug in their lifetime, 7.5% in the past 12 months and 4.0% in the past month.
" Lifetime usage of cannabis (24.0%) is considerably higher than any other form of drug. The second most commonly used drug is ecstasy (7.8%) with lifetime usage of cocaine (including crack) and cocaine powder at 6.6% and 6.4% respectively.
"The findings on drug use are based partly on positive findings from urine tests and partly on reported use during the last 30 days. The levels are overall quite similar to 2012. A proportion of 10 per cent reported having used an illegal morphine substance during the past month, 33 per cent cannabis, 16 per cent stimulants and as many as 42 per cent benzodiazepines. This figure includes both prescribed and non-prescribed benzodiazepines. Twenty-five per cent of all patients report having been prescribed the drug by a doctor. In other words, the others must have used illegal sources.
"Comparisons with the previous four sweeps of the SCJS [Scottish Crime and Justice Survey] help to put these findings in context and reveals that the percentage of adults reporting using one or more illicit drugs has been declining. Table 2.1 and Figure 2.1 show this decline in the number of adults reporting illicit drug use for all three time periods used in the survey between the SCJS 2008/09 and the SCJS 2014/1510. The decline was significant comparing drug use reported in the 2008/09 survey with that reported in 2014/15.