 When the RPF took over, approximately two million Hutu fled to neighbouring countries, in particular Zaïre, fearing reprisals; additionally, the RPF-led army was a key belligerent in the First and Second Congo Wars.Within Rwanda, a period of reconciliation and justice began, with the establishment of the International Criminal Tribunal for Rwanda (ICTR) and the reintroduction of "Gacaca", a traditional village court system.Since 2000 Rwanda's economy, tourist numbers, and Human Development Index have grown rapidly; between 2006 and 2011 the poverty rate reduced from 57% to 45%, while life expectancy rose from 46.6 years in 2000 to 59.7 years in 2015.