The US has 2.3 million people behind bars, more than any other country and more than ever before in its history, Human Rights Watch says. This means an incarceration rate of 762 per 100,000 residents, compared with 152 per 100,000 in Britain, 108 in Canada, and 91 in France, the organisation said in a statement commenting on Justice Department figures released yesterday. The figures show a sharp racial imbalance in the US prison population, with blacks outnumbering whites by six to one. Nearly 11% of black men aged 30-34 are in prison, according to Justice Department figures. Human Rights Watch said blacks were 12 times more likely to be jailed for drug-related crimes than whites, though drug use was about the same in the two races. “Although whites, being more numerous, constitute the large majority of drug users, blacks constitute 54% of all persons entering prisons with a new drug offence conviction,” it said.