When Jamaica gained independence in 1962, the murder rate was 3.9 per 100,000 inhabitants, one of the lowest in the world. By 2009, the rate was 62 per 100,000 inhabitants, one of the highest in the world. Gang violence became a serious problem, with organised crime being centred around Jamaican posses or "Yardies". Jamaica has had one of the highest murder rates in the world for many years, according to UN estimates. Some areas of Jamaica, particularly poor areas in Kingston, Montego Bay and elsewhere experience high levels of crime and violence.