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The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
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and transmitted securely.
Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1968 | 1 |
| 1969 | 1 |
| 1974 | 1 |
| 1981 | 1 |
| 1983 | 1 |
| 1997 | 2 |
| 2004 | 1 |
| 2006 | 1 |
| 2008 | 2 |
| 2009 | 6 |
| 2010 | 5 |
| 2011 | 6 |
| 2012 | 5 |
| 2013 | 5 |
| 2014 | 2 |
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 2 |
| 2020 | 1 |
| 2023 | 1 |
| 2025 | 1 |