Notes
1. The list of these twenty regimes comprises Afghanistan (1996–2001), Albania (1944–1991), Algeria (1962–), Angola (1975–), Bolivia (1952–1964), Cambodia (1975–1979), China (1949–), Cuba (1959–), Eritrea (1993–), Finland (1918), Guinea-Bissau (1974–1999), Hungary (1919), Iran (1979–), Mexico (1915–2000), Mozambique (1975–), Nicaragua (1979–1990), Russia/Soviet Union (1917–1991), Rwanda (1994–), Vietnam (1954–), and Yugoslavia (1945–1990).