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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1917 | 1 |
| 1918 | 1 |
| 1920 | 1 |
| 1924 | 1 |
| 1928 | 1 |
| 1929 | 1 |
| 1931 | 1 |
| 1933 | 1 |
| 1942 | 1 |
| 1958 | 1 |
| 1973 | 1 |
| 1974 | 1 |
| 1976 | 3 |
| 1980 | 1 |
| 1988 | 1 |
| 1997 | 1 |
| 2008 | 1 |
| 2009 | 5 |
| 2010 | 2 |
| 2011 | 2 |
| 2012 | 3 |
| 2013 | 1 |
| 2014 | 9 |
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 9 |
| 2020 | 4 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 4 |