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Federal government websites often end in .gov or .mil. Before
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and transmitted securely.
Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1931 | 1 |
| 1932 | 1 |
| 1933 | 1 |
| 1934 | 1 |
| 1939 | 1 |
| 1940 | 3 |
| 1942 | 1 |
| 1946 | 1 |
| 1947 | 1 |
| 1949 | 1 |
| 1953 | 1 |
| 1954 | 1 |
| 1956 | 1 |
| 1957 | 1 |
| 1971 | 1 |
| 1986 | 1 |
| 1988 | 1 |
| 1993 | 1 |
| 2001 | 1 |
| 2002 | 1 |
| 2004 | 4 |
| 2005 | 1 |
| 2007 | 5 |
| 2008 | 4 |
| 2009 | 3 |
| 2013 | 1 |
| 2014 | 2 |
| 2016 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 7 |
| 2021 | 8 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 5 |
| 2025 | 2 |