Following the 1991 Paris Peace Accords which formally ended the war with Vietnam, Cambodia was governed briefly by a United Nations mission (1992–93). The UN withdrew after holding elections in which around 90 percent of the registered voters cast ballots. The 1997 coup d'état consolidated power under Prime Minister Hun Sen and the Cambodian People's Party, who remain in power. Cambodia is a member of the United Nations since 1955, ASEAN, the RCEP, the East Asia Summit, the WTO, the Non-Aligned Movement and La Francophonie. According to several foreign organisations, the country has widespread poverty, pervasive corruption, lack of political freedoms, low human development and a high rate of hunger. Cambodia has been described by Human Rights Watch's Southeast Asian Director, David Roberts, as a "relatively authoritarian coalition via a superficial democracy". Constitutionally a multi-party liberal democracy, the country is ''de facto'' governed under one-party rule as of 2018.