Era
1992-
13
1989-
10
2003-
10
2001-
7
1940-
6
1928-
5
2010
5
Appropriations and expenditures, 1962
5
1904-
4
1908-
4
1911-
4
1991-
4
2001 - 2009
4
2001-2021
4
Civil War, 2011-
4
Since 2001
4
Since 2003
4
1915-
3
1943-
3
1980-
3
1986-
3
1990 - 1991
3
1990-1991
3
1991-2003
3
2015
3
2016
3
2017
3
Appropriations and expenditures, 2018
3
Appropriations and expenditures, 2019
3
Unification, 1990
3
1879-1967
2
1900-1995
2
1904-1993
2
1905-
2
1910-
2
1910-1978
2
1911-1981
2
1915-2005
2
1922-
2
1927-
2
1927-2012
2
1980-2008
2
1990
2
1992 - 1993
2
1992-1993
2
2001
2
2003 - 2011
2
2003-2011
2
2020
2
21st century
2
more ...