20th century 48
21st century 43
1989- 39
1945- 24
1945-1989 14
2001- 7
19th century 5
1945-89 3
1946- 3
1975-1985 3
1989 3
1724-1804 2
1936-1945 2
1953- 2
1953-1975 2
1985-1995 2
1997- 2
1583-1645 1
1588-1679 1
1648-1789 1
16th century 1
1780-1831 1
17th century 1
1809-1865 1
1818-1883 1
1868-1963 1
1869-1948 1
1888-1985 1
18th century 1
1901-1981 1
1904- 1
1913-1992 1
1925-1995 1
1930-2002 1
1932-1985 1
1945-1991 1
1947-1984 1
1949- 1
1953-1961 1
1955-1965 1
1960- 1
1966- 1
1969-1974 1
1974-1977 1
1976- 1
1977-1981 1
1981-1989 1
1984- 1
1985-1991 1
1989-1994 1
Intervention, 1956 1
To 1900 1
To 1964 1
Unification, 1990 1