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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 |
|---|---|
| 1955 | 1 |
| 1958 | 2 |
| 1960 | 1 |
| 1967 | 1 |
| 1973 | 1 |
| 1974 | 1 |
| 1976 | 1 |
| 1980 | 2 |
| 1986 | 1 |
| 1990 | 2 |
| 1992 | 2 |
| 1996 | 1 |
| 2001 | 1 |
| 2002 | 4 |
| 2003 | 2 |
| 2004 | 4 |
| 2006 | 2 |
| 2007 | 3 |
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 2 |
| 2012 | 3 |
| 2013 | 2 |
| 2015 | 2 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 3 |
| 2024 | 3 |
| 2025 | 1 |