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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 |
| 1961 | 1 |
| 1962 | 3 |
| 1963 | 1 |
| 1964 | 4 |
| 1965 | 2 |
| 1966 | 1 |
| 1967 | 2 |
| 1968 | 4 |
| 1969 | 2 |
| 1970 | 2 |
| 1971 | 1 |
| 1973 | 1 |
| 1975 | 1 |
| 1977 | 3 |
| 1978 | 1 |
| 1981 | 2 |
| 1998 | 1 |
| 2002 | 1 |
| 2006 | 2 |
| 2007 | 5 |
| 2008 | 5 |
| 2009 | 7 |
| 2010 | 10 |
| 2011 | 13 |
| 2012 | 6 |
| 2013 | 6 |
| 2014 | 9 |
| 2015 | 11 |
| 2016 | 6 |
| 2017 | 7 |
| 2018 | 10 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 7 |
| 2022 | 2 |
| 2025 | 1 |
| 2026 | 0 |