| Year | Majority Seats Up | Minority Seats Up | Majority Advantage |
| 2018 | 6 | 26 | 20 |
| 2008 | 12 | 23 | 11 |
| 1954 | 12 | 20 | 8 |
| 1898 | 11 | 19 | 8 |
| 1928 | 12 | 19 | 7 |
| 1982 | 13 | 19 | 6 |
| 1952 | 13 | 19 | 6 |
| 1972 | 14 | 19 | 5 |
| 2004 | 15 | 19 | 4 |
| 1896 | 13 | 17 | 4 |
| 1882 | 11 | 15 | 4 |
| 1934 | 14 | 17 | 3 |
| 1884 | 11 | 14 | 3 |
| 1846 | 8 | 11 | 3 |
| 1842 | 7 | 10 | 3 |
| 1836 | 7 | 10 | 3 |
| 1998 | 16 | 18 | 2 |
| 1956 | 15 | 17 | 2 |
| 1920 | 15 | 17 | 2 |
| 1914 | 16 | 18 | 2 |
| 1894 | 14 | 16 | 2 |
| 1888 | 12 | 14 | 2 |
| 1830 | 7 | 9 | 2 |
| 1990 | 17 | 18 | 1 |
| 1978 | 16 | 17 | 1 |
| 1798 | 5 | 6 | 1 |
| 1794 | 4 | 5 | 1 |
| 1932 | 16 | 16 | 0 |
| 1906 | 15 | 15 | 0 |
| 1852 | 10 | 10 | 0 |
| 1834 | 8 | 8 | 0 |
| 1826 | 8 | 8 | 0 |
| 2010 | 19 | 18 | -1 |
| 1862 | 10 | 9 | -1 |
| 1854 | 11 | 10 | -1 |
| 1792 | 6 | 5 | -1 |
| 2006 | 17 | 15 | -2 |
| 1922 | 17 | 15 | -2 |
| 1916 | 17 | 15 | -2 |
| 1832 | 9 | 7 | -2 |
| 1988 | 18 | 15 | -3 |
| 1966 | 18 | 15 | -3 |
| 1924 | 17 | 14 | -3 |
| 1880 | 14 | 11 | -3 |
| 1864 | 9 | 6 | -3 |
| 1856 | 12 | 9 | -3 |
| 1838 | 10 | 7 | -3 |
| 1804 | 7 | 4 | -3 |
| 2000 | 19 | 15 | -4 |
| 1996 | 19 | 15 | -4 |
| 1962 | 19 | 15 | -4 |
| 1948 | 18 | 14 | -4 |
| 1918 | 18 | 14 | -4 |
| 1900 | 17 | 13 | -4 |
| 1890 | 16 | 12 | -4 |
| 1814 | 8 | 4 | -4 |
| 1800 | 7 | 3 | -4 |
| 1984 | 19 | 14 | -5 |
| 1908 | 18 | 13 | -5 |
| 1886 | 15 | 10 | -5 |
| 1844 | 11 | 6 | -5 |
| 1828 | 10 | 5 | -5 |
| 1820 | 10 | 5 | -5 |
| 1796 | 8 | 3 | -5 |
| 1790 | 7 | 2 | -5 |
| 2014 | 21 | 15 | -6 |
| 1992 | 20 | 14 | -6 |
| 1974 | 20 | 14 | -6 |
| 1970 | 24 | 18 | -6 |
| 1930 | 19 | 13 | -6 |
| 1912 | 19 | 13 | -6 |
| 1902 | 18 | 12 | -6 |
| 1860 | 14 | 8 | -6 |
| 1808 | 9 | 3 | -6 |
| 1994 | 20 | 13 | -7 |
| 1892 | 18 | 11 | -7 |
| 1850 | 14 | 7 | -7 |
| 1816 | 9 | 2 | -7 |
| 1810 | 9 | 2 | -7 |
| 1806 | 9 | 2 | -7 |
| 1802 | 9 | 2 | -7 |
| 1958 | 20 | 12 | -8 |
| 1950 | 20 | 12 | -8 |
| 1936 | 19 | 11 | -8 |
| 1876 | 17 | 9 | -8 |
| 1840 | 13 | 5 | -8 |
| 1818 | 11 | 3 | -8 |
| 1812 | 10 | 2 | -8 |
| 1878 | 17 | 8 | -9 |
| 1866 | 13 | 4 | -9 |
| 1848 | 14 | 5 | -9 |
| 2002 | 21 | 11 | -10 |
| 1944 | 21 | 11 | -10 |
| 2012 | 21 | 10 | -11 |
| 1976 | 21 | 10 | -11 |
| 1960 | 22 | 11 | -11 |
| 1946 | 21 | 10 | -11 |
| 1986 | 24 | 12 | -12 |
| 1968 | 23 | 11 | -12 |
| 1868 | 17 | 5 | -12 |
| 1858 | 17 | 5 | -12 |
| 1822 | 14 | 2 | -12 |
| 2016 | 24 | 10 | -14 |
| 1980 | 24 | 10 | -14 |
| 1942 | 23 | 9 | -14 |
| 1824 | 15 | 1 | -14 |
| 1874 | 20 | 5 | -15 |
| 1940 | 23 | 7 | -16 |
| 1904 | 23 | 7 | -16 |
| 1872 | 20 | 4 | -16 |
| 1964 | 26 | 9 | -17 |
| 1870 | 21 | 4 | -17 |
| 1926 | 25 | 7 | -18 |
| 1910 | 24 | 6 | -18 |
| 1938 | 29 | 3 | -26 |