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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 |
|---|---|
| 1970 | 1 |
| 1972 | 1 |
| 1975 | 1 |
| 1976 | 1 |
| 1983 | 1 |
| 1985 | 1 |
| 1989 | 1 |
| 1990 | 2 |
| 1992 | 1 |
| 1995 | 1 |
| 1997 | 3 |
| 1998 | 2 |
| 1999 | 7 |
| 2000 | 8 |
| 2001 | 10 |
| 2002 | 22 |
| 2003 | 15 |
| 2004 | 28 |
| 2005 | 36 |
| 2006 | 48 |
| 2007 | 60 |
| 2008 | 57 |
| 2009 | 59 |
| 2010 | 68 |
| 2011 | 93 |
| 2012 | 72 |
| 2013 | 90 |
| 2014 | 80 |
| 2015 | 133 |
| 2016 | 117 |
| 2017 | 97 |
| 2018 | 128 |
| 2019 | 121 |
| 2020 | 137 |
| 2021 | 141 |
| 2022 | 129 |
| 2023 | 26 |