Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1807 | 1 |
| 1813 | 1 |
| 1823 | 2 |
| 1824 | 1 |
| 1825 | 1 |
| 1829 | 1 |
| 1859 | 1 |
| 1868 | 4 |
| 1869 | 1 |
| 1870 | 1 |
| 1871 | 3 |
| 1873 | 1 |
| 1874 | 1 |
| 1875 | 3 |
| 1876 | 1 |
| 1878 | 1 |
| 1880 | 7 |
| 1881 | 2 |
| 1884 | 1 |
| 1885 | 1 |
| 1887 | 3 |
| 1889 | 1 |
| 1890 | 2 |
| 1895 | 2 |
| 1896 | 2 |
| 1897 | 1 |
| 1898 | 3 |
| 1899 | 2 |
| 1900 | 1 |
| 1901 | 1 |
| 1902 | 1 |
| 1903 | 2 |
| 1904 | 1 |
| 1905 | 1 |
| 1906 | 1 |
| 1911 | 1 |
| 1919 | 2 |
| 1920 | 1 |
| 1922 | 2 |
| 1923 | 1 |
| 1924 | 1 |
| 1925 | 1 |
| 1927 | 3 |
| 1928 | 1 |
| 1930 | 1 |
| 1931 | 2 |
| 1933 | 1 |
| 1935 | 1 |
| 1936 | 1 |
| 1937 | 1 |
| 1938 | 1 |
| 1945 | 1 |
| 1946 | 5 |
| 1947 | 12 |
| 1948 | 12 |
| 1949 | 7 |
| 1950 | 13 |
| 1951 | 16 |
| 1952 | 17 |
| 1953 | 17 |
| 1954 | 16 |
| 1955 | 13 |
| 1956 | 26 |
| 1957 | 24 |
| 1958 | 16 |
| 1959 | 15 |
| 1960 | 25 |
| 1961 | 30 |
| 1962 | 24 |
| 1963 | 49 |
| 1964 | 26 |
| 1965 | 25 |
| 1966 | 31 |
| 1967 | 39 |
| 1968 | 41 |
| 1969 | 32 |
| 1970 | 42 |
| 1971 | 31 |
| 1972 | 37 |
| 1973 | 42 |
| 1974 | 37 |
| 1975 | 46 |
| 1976 | 32 |
| 1977 | 43 |
| 1978 | 34 |
| 1979 | 46 |
| 1980 | 40 |
| 1981 | 51 |
| 1982 | 65 |
| 1983 | 60 |
| 1984 | 60 |
| 1985 | 58 |
| 1986 | 57 |
| 1987 | 81 |
| 1988 | 77 |
| 1989 | 104 |
| 1990 | 84 |
| 1991 | 93 |
| 1992 | 97 |
| 1993 | 100 |
| 1994 | 84 |
| 1995 | 87 |
| 1996 | 103 |
| 1997 | 95 |
| 1998 | 96 |
| 1999 | 82 |
| 2000 | 138 |
| 2001 | 126 |
| 2002 | 139 |
| 2003 | 136 |
| 2004 | 161 |
| 2005 | 125 |
| 2006 | 163 |
| 2007 | 179 |
| 2008 | 182 |
| 2009 | 207 |
| 2010 | 223 |
| 2011 | 259 |
| 2012 | 280 |
| 2013 | 274 |
| 2014 | 281 |
| 2015 | 290 |
| 2016 | 279 |
| 2017 | 282 |
| 2018 | 310 |
| 2019 | 314 |
| 2020 | 336 |
| 2021 | 135 |