| 2024 vs 2020 |
6 |
77 |
Arizona, Georgia, Michigan, Nevada, Pennsylvania, Wisconsin |
| 2020 vs 2016 |
5 |
73 |
Arizona, Georgia, Michigan, Pennsylvania, Wisconsin |
| 2016 vs 2012 |
6 |
99 |
Florida, Iowa, Michigan, Ohio, Pennsylvania, Wisconsin |
| 2012 vs 2008 |
2 |
26 |
Indiana, North Carolina |
| 2008 vs 2004 |
9 |
112 |
Colorado, Florida, Indiana, Iowa, Nevada, New Mexico, North Carolina, Ohio, Virginia |
| 2004 vs 2000 |
3 |
16 |
Iowa, New Hampshire, New Mexico |
| 2000 vs 1996 |
11 |
112 |
Arizona, Arkansas, Florida, Kentucky, Louisiana, Missouri, Nevada, New Hampshire, Ohio, Tennessee, West Virginia |
| 1996 vs 1992 |
5 |
57 |
Arizona, Colorado, Florida, Georgia, Montana |
| 1992 vs 1988 |
22 |
263 |
Arkansas, California, Colorado, Connecticut, Delaware, Georgia, Illinois, Kentucky, Louisiana, Maine, Maryland, Michigan, Missouri, Montana, Nevada, New Hampshire, New Jersey, New Mexico, Ohio, Pennsylvania, Tennessee, Vermont |
| 1988 vs 1984 |
9 |
98 |
Hawaii, Iowa, Massachusetts, New York, Oregon, Rhode Island, Washington, West Virginia, Wisconsin |
| 1984 vs 1980 |
5 |
36 |
Georgia, Hawaii, Maryland, Rhode Island, West Virginia |
| 1980 vs 1976 |
17 |
248 |
Alabama, Arkansas, Delaware, Florida, Kentucky, Louisiana, Massachusetts, Mississippi, Missouri, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Texas, Wisconsin |
| 1976 vs 1972 |
22 |
280 |
Alabama, Arkansas, Delaware, Florida, Georgia, Hawaii, Kentucky, Louisiana, Maryland, Minnesota, Mississippi, Missouri, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, West Virginia, Wisconsin |
| 1972 vs 1968 |
17 |
214 |
Alabama, Arkansas, Connecticut, Georgia, Hawaii, Louisiana, Maine, Maryland, Michigan, Minnesota, Mississippi, New York, Pennsylvania, Rhode Island, Texas, Washington, West Virginia |
| 1968 vs 1964 |
35 |
334 |
Alabama, Alaska, Arkansas, California, Colorado, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, South Dakota, Tennessee, Utah, Vermont, Virginia, Wisconsin, Wyoming |
| 1964 vs 1960 |
30 |
271 |
Alabama, Alaska, California, Colorado, Florida, Georgia, Idaho, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Mississippi, Montana, Nebraska, New Hampshire, North Dakota, Ohio, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming |
| 1960 vs 1956 |
16 |
240 |
Connecticut, Delaware, Illinois, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Nevada, New Jersey, New Mexico, New York, Pennsylvania, Rhode Island, Texas, West Virginia |
| 1956 vs 1952 |
4 |
41 |
Kentucky, Louisiana, Missouri, West Virginia |
| 1952 vs 1948 |
27 |
293 |
Alabama, Arizona, California, Colorado, Florida, Idaho, Illinois, Iowa, Louisiana, Massachusetts, Minnesota, Mississippi, Missouri, Montana, Nevada, New Mexico, Ohio, Oklahoma, Rhode Island, South Carolina, Tennessee, Texas, Utah, Virginia, Washington, Wisconsin, Wyoming |
| 1948 vs 1944 |
18 |
240 |
Alabama, Colorado, Connecticut, Delaware, Iowa, Louisiana, Maryland, Michigan, Mississippi, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, South Carolina, Wisconsin, Wyoming |
| 1944 vs 1940 |
4 |
59 |
Michigan, Ohio, Wisconsin, Wyoming |
| 1940 vs 1936 |
8 |
74 |
Colorado, Indiana, Iowa, Kansas, Michigan, Nebraska, North Dakota, South Dakota |
| 1936 vs 1932 |
4 |
51 |
Connecticut, Delaware, New Hampshire, Pennsylvania |
| 1932 vs 1928 |
34 |
392 |
Arizona, California, Colorado, Florida, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Maryland, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, Wyoming |
| 1928 vs 1924 |
9 |
108 |
Florida, Massachusetts, North Carolina, Oklahoma, Rhode Island, Tennessee, Texas, Virginia, Wisconsin |
| 1924 vs 1920 |
4 |
48 |
Kentucky, Oklahoma, Tennessee, Wisconsin |
| 1920 vs 1916 |
19 |
149 |
Arizona, California, Colorado, Idaho, Kansas, Maryland, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Mexico, North Dakota, Ohio, Oklahoma, Tennessee, Utah, Washington, Wyoming |
| 1916 vs 1912 |
20 |
275 |
California, Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Massachusetts, Michigan, Minnesota, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, South Dakota, Utah, Washington, West Virginia, Wisconsin |
| 1912 vs 1908 |
27 |
343 |
California, Connecticut, Delaware, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Massachusetts, Michigan, Minnesota, Missouri, Montana, New Hampshire, New Jersey, New York, North Dakota, Ohio, Oregon, Pennsylvania, Rhode Island, South Dakota, Washington, West Virginia, Wisconsin, Wyoming |
| 1908 vs 1904 |
3 |
16 |
Colorado, Nebraska, Nevada |
| 1904 vs 1900 |
6 |
40 |
Colorado, Idaho, Maryland, Missouri, Montana, Nevada |
| 1900 vs 1896 |
7 |
45 |
Kansas, Kentucky, Nebraska, South Dakota, Utah, Washington, Wyoming |
| 1896 vs 1892 |
21 |
187 |
California, Colorado, Connecticut, Delaware, Idaho, Illinois, Indiana, Kansas, Kentucky, Maryland, Montana, Nebraska, Nevada, New Jersey, New York, North Dakota, South Dakota, Washington, West Virginia, Wisconsin, Wyoming |
| 1892 vs 1888 |
8 |
113 |
California, Colorado, Illinois, Indiana, Kansas, Nevada, New York, Wisconsin |
| 1888 vs 1884 |
2 |
51 |
Indiana, New York |
| 1884 vs 1880 |
5 |
68 |
California, Connecticut, Indiana, Nevada, New York |
| 1880 vs 1876 |
8 |
84 |
California, Connecticut, Florida, Indiana, Louisiana, Nevada, New York, South Carolina |
| 1876 vs 1872 |
11 |
118 |
Alabama, Arkansas, Connecticut, Delaware, Indiana, Mississippi, New Jersey, New York, North Carolina, Virginia, West Virginia |
| 1872 vs 1868 |
7 |
50 |
Delaware, Louisiana, Missouri, New Jersey, New York, Oregon, Tennessee |
| 1868 vs 1864 |
3 |
43 |
Maryland, New York, Oregon |
| 1864 vs 1860 |
5 |
39 |
Delaware, Kentucky, Maryland, Missouri, New Jersey |
| 1860 vs 1856 |
18 |
165 |
Alabama, Arkansas, California, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Mississippi, New Jersey, North Carolina, Pennsylvania, Tennessee, Texas, Virginia |
| 1856 vs 1852 |
14 |
146 |
Connecticut, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New York, Ohio, Rhode Island, Tennessee, Vermont, Wisconsin |
| 1852 vs 1848 |
11 |
119 |
Connecticut, Delaware, Florida, Georgia, Louisiana, Maryland, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island |
| 1848 vs 1844 |
5 |
101 |
Georgia, Louisiana, New York, Ohio, Pennsylvania |
| 1844 vs 1840 |
8 |
110 |
Georgia, Indiana, Louisiana, Maine, Michigan, Mississippi, New York, Pennsylvania |
| 1840 vs 1836 |
9 |
121 |
Connecticut, Louisiana, Maine, Michigan, Mississippi, New York, North Carolina, Pennsylvania, Rhode Island |
| 1836 vs 1832 |
12 |
125 |
Connecticut, Delaware, Georgia, Indiana, Kentucky, Maryland, Massachusetts, New Jersey, Ohio, Rhode Island, Tennessee, Vermont |
| 1832 vs 1828 |
5 |
47 |
Kentucky, Maine, New Hampshire, New Jersey, Vermont |
| 1828 vs 1824 |
18 |
190 |
Alabama, Connecticut, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Mississippi, Missouri, New Hampshire, New Jersey, North Carolina, Ohio, Pennsylvania, Rhode Island, Tennessee, Virginia |