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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 |
|---|---|
| 1956 | 1 |
| 1958 | 1 |
| 1961 | 2 |
| 1963 | 3 |
| 1964 | 2 |
| 2008 | 5 |
| 2009 | 7 |
| 2010 | 57 |
| 2011 | 237 |
| 2012 | 418 |
| 2013 | 1625 |
| 2014 | 3232 |
| 2015 | 4413 |
| 2016 | 5493 |
| 2017 | 6506 |
| 2018 | 8162 |
| 2019 | 10964 |
| 2020 | 12935 |
| 2021 | 13663 |
| 2022 | 12764 |
| 2023 | 11732 |
| 2024 | 10637 |
| 2025 | 13 |