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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1855 | 1 |
| 1864 | 1 |
| 1866 | 1 |
| 1869 | 1 |
| 1870 | 1 |
| 1890 | 1 |
| 1902 | 1 |
| 1908 | 1 |
| 1913 | 2 |
| 1917 | 1 |
| 1918 | 2 |
| 1919 | 2 |
| 1920 | 2 |
| 1921 | 3 |
| 1923 | 5 |
| 1924 | 3 |
| 1925 | 1 |
| 1926 | 2 |
| 1929 | 2 |
| 1931 | 1 |
| 1935 | 1 |
| 1939 | 1 |
| 1940 | 2 |
| 1944 | 1 |
| 1945 | 3 |
| 1946 | 5 |
| 1947 | 3 |
| 1948 | 4 |
| 1949 | 8 |
| 1950 | 12 |
| 1951 | 12 |
| 1952 | 10 |
| 1953 | 10 |
| 1954 | 8 |
| 1955 | 6 |
| 1956 | 9 |
| 1957 | 9 |
| 1958 | 5 |
| 1959 | 6 |
| 1960 | 4 |
| 1961 | 5 |
| 1962 | 5 |
| 1963 | 3 |
| 1964 | 8 |
| 1965 | 6 |
| 1966 | 6 |
| 1967 | 11 |
| 1968 | 12 |
| 1969 | 10 |
| 1970 | 9 |
| 1971 | 7 |
| 1972 | 17 |
| 1973 | 12 |
| 1974 | 10 |
| 1975 | 3 |
| 1976 | 20 |
| 1977 | 30 |
| 1978 | 20 |
| 1979 | 25 |
| 1980 | 20 |
| 1981 | 18 |
| 1982 | 34 |
| 1983 | 33 |
| 1984 | 39 |
| 1985 | 37 |
| 1986 | 21 |
| 1987 | 21 |
| 1988 | 21 |
| 1989 | 32 |
| 1990 | 46 |
| 1991 | 38 |
| 1992 | 36 |
| 1993 | 44 |
| 1994 | 60 |
| 1995 | 76 |
| 1996 | 71 |
| 1997 | 90 |
| 1998 | 79 |
| 1999 | 75 |
| 2000 | 123 |
| 2001 | 108 |
| 2002 | 117 |
| 2003 | 140 |
| 2004 | 146 |
| 2005 | 139 |
| 2006 | 137 |
| 2007 | 170 |
| 2008 | 192 |
| 2009 | 199 |
| 2010 | 207 |
| 2011 | 242 |
| 2012 | 273 |
| 2013 | 286 |
| 2014 | 273 |
| 2015 | 277 |
| 2016 | 313 |
| 2017 | 300 |
| 2018 | 279 |
| 2019 | 243 |
| 2020 | 333 |
| 2021 | 364 |
| 2022 | 329 |
| 2023 | 326 |