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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1855 | 1 |
| 1860 | 2 |
| 1861 | 1 |
| 1917 | 1 |
| 1943 | 1 |
| 1947 | 2 |
| 1949 | 1 |
| 1961 | 1 |
| 1964 | 1 |
| 1966 | 2 |
| 1971 | 1 |
| 1972 | 1 |
| 1974 | 1 |
| 1975 | 1 |
| 1977 | 1 |
| 1979 | 1 |
| 1985 | 1 |
| 1989 | 1 |
| 1991 | 1 |
| 1995 | 1 |
| 1997 | 1 |
| 1999 | 2 |
| 2002 | 2 |
| 2005 | 1 |
| 2008 | 1 |
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 1 |
| 2012 | 2 |
| 2013 | 4 |
| 2014 | 4 |
| 2015 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 1 |
| 2020 | 5 |
| 2021 | 4 |
| 2023 | 1 |
| 2025 | 2 |