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The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
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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 |
|---|---|
| 1965 | 1 |
| 2001 | 66 |
| 2002 | 276 |
| 2003 | 369 |
| 2004 | 422 |
| 2005 | 449 |
| 2006 | 536 |
| 2007 | 617 |
| 2008 | 617 |
| 2009 | 599 |
| 2010 | 630 |
| 2011 | 717 |
| 2012 | 790 |
| 2013 | 1122 |
| 2014 | 1988 |
| 2015 | 2646 |
| 2016 | 2865 |
| 2017 | 3105 |
| 2018 | 3173 |
| 2019 | 3392 |
| 2020 | 3924 |
| 2021 | 4376 |
| 2022 | 4194 |
| 2023 | 3887 |
| 2024 | 1521 |