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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 |
|---|---|
| 1971 | 1 |
| 1978 | 1 |
| 1980 | 1 |
| 1983 | 1 |
| 1984 | 1 |
| 1993 | 1 |
| 2001 | 1 |
| 2002 | 8 |
| 2003 | 18 |
| 2004 | 28 |
| 2005 | 22 |
| 2006 | 34 |
| 2007 | 33 |
| 2008 | 35 |
| 2009 | 48 |
| 2010 | 41 |
| 2011 | 58 |
| 2012 | 72 |
| 2013 | 87 |
| 2014 | 79 |
| 2015 | 103 |
| 2016 | 110 |
| 2017 | 119 |
| 2018 | 165 |
| 2019 | 162 |
| 2020 | 175 |
| 2021 | 194 |
| 2022 | 214 |
| 2023 | 210 |
| 2024 | 90 |