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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 |
|---|---|
| 1952 | 6 |
| 1953 | 1 |
| 1955 | 1 |
| 1956 | 1 |
| 1958 | 1 |
| 1960 | 1 |
| 1961 | 1 |
| 1962 | 1 |
| 1963 | 5 |
| 1965 | 2 |
| 1978 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 1 |
| 2002 | 2 |
| 2004 | 1 |
| 2006 | 3 |
| 2007 | 1 |
| 2008 | 2 |
| 2009 | 2 |
| 2010 | 1 |
| 2011 | 2 |
| 2012 | 3 |
| 2013 | 10 |
| 2014 | 14 |
| 2015 | 8 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 8 |
| 2020 | 14 |
| 2021 | 10 |
| 2022 | 28 |
| 2023 | 2 |