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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1846 | 1 |
| 1848 | 1 |
| 1849 | 1 |
| 1850 | 2 |
| 1863 | 1 |
| 1869 | 1 |
| 1884 | 3 |
| 1885 | 3 |
| 1895 | 1 |
| 1898 | 1 |
| 1899 | 1 |
| 1969 | 1 |
| 1971 | 1 |
| 1972 | 1 |
| 1973 | 2 |
| 1974 | 1 |
| 1975 | 2 |
| 1977 | 1 |
| 1978 | 1 |
| 1984 | 1 |
| 1986 | 2 |
| 1987 | 2 |
| 1988 | 1 |
| 1990 | 1 |
| 1992 | 2 |
| 1993 | 3 |
| 1995 | 1 |
| 1997 | 2 |
| 1999 | 2 |
| 2000 | 2 |
| 2001 | 1 |
| 2002 | 3 |
| 2003 | 1 |
| 2004 | 3 |
| 2005 | 3 |
| 2006 | 3 |
| 2007 | 1 |
| 2008 | 1 |
| 2009 | 2 |
| 2010 | 4 |
| 2011 | 3 |
| 2012 | 2 |
| 2013 | 3 |
| 2014 | 1 |
| 2016 | 7 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 7 |
| 2021 | 8 |
| 2022 | 7 |
| 2023 | 2 |