Era
20th century
25
1900-1999
7
1945-
4
21st century
4
19th century
3
2000-2099
3
1861-1917
2
1917-1963
2
1933-1945
2
1961-1963
2
1783-1865
1
1789-1900
1
1800-1999
1
1890-1969
1
1905-1981
1
1913-1981
1
1925-1953
1
1936-1945
1
1939-1945
1
1949-1976
1
1959-1995
1
1960-
1
1975-1985
1
1976-2000
1
1981-
1
1981-2001
1
1989-
1
1991-
1
2000-
1
Apropriations and expenditures, 1986
1
Charles II, 1660-1685
1
Since 1976
1