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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 |
|---|---|
| 1965 | 1 |
| 1966 | 1 |
| 1968 | 3 |
| 1969 | 1 |
| 1972 | 2 |
| 1973 | 1 |
| 1979 | 1 |
| 1981 | 1 |
| 1983 | 3 |
| 1984 | 1 |
| 1985 | 1 |
| 1986 | 1 |
| 1987 | 1 |
| 1989 | 1 |
| 1995 | 1 |
| 1997 | 1 |
| 1998 | 1 |
| 2000 | 1 |
| 2009 | 1 |
| 2010 | 2 |
| 2011 | 3 |
| 2012 | 13 |
| 2013 | 7 |
| 2014 | 2 |
| 2015 | 1 |
| 2018 | 1 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 4 |
| 2025 | 1 |