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Federal government websites often end in .gov or .mil. Before
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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1878 | 1 |
| 1881 | 1 |
| 1960 | 1 |
| 1961 | 1 |
| 1963 | 3 |
| 1966 | 1 |
| 1970 | 2 |
| 1973 | 2 |
| 1974 | 4 |
| 1975 | 1 |
| 1976 | 2 |
| 1980 | 1 |
| 1981 | 2 |
| 1982 | 1 |
| 1984 | 1 |
| 1986 | 4 |
| 1987 | 5 |
| 1989 | 2 |
| 1990 | 1 |
| 1991 | 2 |
| 1995 | 1 |
| 1996 | 2 |
| 1999 | 1 |
| 2001 | 2 |
| 2002 | 1 |
| 2003 | 1 |
| 2005 | 1 |
| 2010 | 1 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 3 |
| 2023 | 1 |
| 2024 | 0 |