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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1846 | 1 |
| 1849 | 1 |
| 1855 | 1 |
| 1859 | 2 |
| 1860 | 1 |
| 1870 | 1 |
| 1876 | 3 |
| 1878 | 1 |
| 1879 | 2 |
| 1880 | 1 |
| 1882 | 1 |
| 1887 | 1 |
| 1892 | 1 |
| 1898 | 1 |
| 1899 | 1 |
| 1901 | 1 |
| 1905 | 1 |
| 1906 | 1 |
| 1911 | 1 |
| 1971 | 1 |
| 1973 | 2 |
| 1987 | 1 |
| 1989 | 3 |
| 1990 | 1 |
| 1994 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2000 | 2 |
| 2002 | 2 |
| 2006 | 2 |
| 2007 | 2 |
| 2008 | 4 |
| 2009 | 3 |
| 2010 | 3 |
| 2011 | 2 |
| 2012 | 7 |
| 2013 | 7 |
| 2014 | 3 |
| 2015 | 3 |
| 2016 | 5 |
| 2017 | 8 |
| 2018 | 11 |
| 2019 | 13 |
| 2020 | 19 |
| 2021 | 35 |
| 2022 | 37 |
| 2023 | 37 |