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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 |
|---|---|
| 1951 | 1 |
| 1952 | 1 |
| 1953 | 2 |
| 1956 | 2 |
| 1957 | 1 |
| 1958 | 4 |
| 1959 | 3 |
| 1963 | 1 |
| 1968 | 1 |
| 1974 | 1 |
| 1977 | 1 |
| 1982 | 1 |
| 1985 | 1 |
| 1999 | 1 |
| 2005 | 1 |
| 2007 | 1 |
| 2008 | 1 |
| 2009 | 1 |
| 2011 | 3 |
| 2012 | 1 |
| 2013 | 3 |
| 2014 | 2 |
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 7 |
| 2018 | 1 |
| 2019 | 1 |
| 2024 | 0 |