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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1850 | 1 |
| 1851 | 1 |
| 1866 | 6 |
| 1867 | 1 |
| 1869 | 2 |
| 1870 | 2 |
| 1872 | 1 |
| 1873 | 4 |
| 1877 | 2 |
| 1893 | 1 |
| 1917 | 1 |
| 1921 | 1 |
| 1922 | 2 |
| 1929 | 1 |
| 1931 | 1 |
| 1934 | 1 |
| 1935 | 1 |
| 1936 | 1 |
| 1940 | 1 |
| 1942 | 1 |
| 1943 | 1 |
| 1944 | 1 |
| 1945 | 2 |
| 1946 | 11 |
| 1947 | 12 |
| 1948 | 25 |
| 1949 | 22 |
| 1950 | 21 |
| 1951 | 12 |
| 1952 | 14 |
| 1953 | 17 |
| 1954 | 11 |
| 1955 | 6 |
| 1956 | 8 |
| 1957 | 13 |
| 1958 | 11 |
| 1959 | 11 |
| 1960 | 10 |
| 1961 | 7 |
| 1962 | 5 |
| 1963 | 5 |
| 1964 | 6 |
| 1965 | 3 |
| 1966 | 5 |
| 1967 | 3 |
| 1968 | 11 |
| 1969 | 5 |
| 1970 | 8 |
| 1971 | 6 |
| 1972 | 4 |
| 1973 | 3 |
| 1974 | 11 |
| 1975 | 5 |
| 1976 | 6 |
| 1977 | 7 |
| 1978 | 6 |
| 1979 | 8 |
| 1980 | 4 |
| 1981 | 12 |
| 1982 | 5 |
| 1983 | 8 |
| 1984 | 7 |
| 1985 | 11 |
| 1986 | 7 |
| 1987 | 9 |
| 1988 | 8 |
| 1989 | 3 |
| 1990 | 10 |
| 1991 | 9 |
| 1992 | 6 |
| 1993 | 7 |
| 1994 | 6 |
| 1995 | 9 |
| 1996 | 15 |
| 1997 | 14 |
| 1998 | 8 |
| 1999 | 7 |
| 2000 | 3 |
| 2001 | 2 |
| 2002 | 6 |
| 2003 | 8 |
| 2004 | 5 |
| 2005 | 9 |
| 2006 | 8 |
| 2007 | 9 |
| 2008 | 6 |
| 2009 | 5 |
| 2010 | 8 |
| 2011 | 11 |
| 2012 | 19 |
| 2013 | 16 |
| 2014 | 24 |
| 2015 | 21 |
| 2016 | 22 |
| 2017 | 18 |
| 2018 | 22 |
| 2019 | 16 |
| 2020 | 25 |
| 2021 | 24 |
| 2022 | 18 |
| 2023 | 2 |