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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
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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 |
|---|---|
| 1963 | 22 |
| 1964 | 16 |
| 1965 | 59 |
| 1966 | 22 |
| 1967 | 67 |
| 1968 | 81 |
| 1969 | 93 |
| 1970 | 70 |
| 1984 | 2 |
| 1991 | 1 |
| 1992 | 1 |
| 1995 | 1 |
| 1999 | 1 |
| 2001 | 1 |
| 2005 | 3 |
| 2006 | 11 |
| 2007 | 55 |
| 2008 | 61 |
| 2009 | 67 |
| 2010 | 48 |
| 2011 | 68 |
| 2012 | 39 |
| 2013 | 46 |
| 2014 | 34 |
| 2015 | 40 |
| 2016 | 29 |
| 2017 | 23 |
| 2018 | 35 |
| 2019 | 41 |
| 2020 | 12 |
| 2021 | 22 |
| 2022 | 17 |
| 2023 | 16 |
| 2024 | 1 |