Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1809 | 1 |
| 1810 | 1 |
| 1815 | 1 |
| 1819 | 2 |
| 1843 | 1 |
| 1852 | 2 |
| 1853 | 1 |
| 1887 | 1 |
| 1889 | 3 |
| 1892 | 1 |
| 1893 | 2 |
| 1894 | 1 |
| 1897 | 2 |
| 1898 | 1 |
| 1899 | 1 |
| 1902 | 5 |
| 1903 | 4 |
| 1904 | 1 |
| 1905 | 3 |
| 1906 | 1 |
| 1908 | 3 |
| 1909 | 2 |
| 1910 | 3 |
| 1911 | 3 |
| 1912 | 4 |
| 1913 | 2 |
| 1914 | 1 |
| 1915 | 1 |
| 1916 | 10 |
| 1918 | 1 |
| 1919 | 2 |
| 1920 | 2 |
| 1921 | 1 |
| 1922 | 2 |
| 1923 | 2 |
| 1925 | 1 |
| 1928 | 2 |
| 1929 | 1 |
| 1930 | 3 |
| 1931 | 5 |
| 1932 | 9 |
| 1933 | 1 |
| 1934 | 1 |
| 1935 | 3 |
| 1936 | 4 |
| 1937 | 1 |
| 1938 | 1 |
| 1939 | 1 |
| 1940 | 3 |
| 1941 | 1 |
| 1942 | 2 |
| 1944 | 1 |
| 1945 | 4 |
| 1946 | 11 |
| 1947 | 15 |
| 1948 | 26 |
| 1949 | 23 |
| 1950 | 20 |
| 1951 | 31 |
| 1952 | 21 |
| 1953 | 21 |
| 1954 | 20 |
| 1955 | 25 |
| 1956 | 20 |
| 1957 | 26 |
| 1958 | 35 |
| 1959 | 24 |
| 1960 | 32 |
| 1961 | 37 |
| 1962 | 34 |
| 1963 | 53 |
| 1964 | 57 |
| 1965 | 50 |
| 1966 | 78 |
| 1967 | 65 |
| 1968 | 70 |
| 1969 | 94 |
| 1970 | 107 |
| 1971 | 94 |
| 1972 | 96 |
| 1973 | 114 |
| 1974 | 117 |
| 1975 | 98 |
| 1976 | 148 |
| 1977 | 157 |
| 1978 | 152 |
| 1979 | 173 |
| 1980 | 221 |
| 1981 | 209 |
| 1982 | 225 |
| 1983 | 212 |
| 1984 | 214 |
| 1985 | 209 |
| 1986 | 208 |
| 1987 | 246 |
| 1988 | 220 |
| 1989 | 240 |
| 1990 | 253 |
| 1991 | 216 |
| 1992 | 291 |
| 1993 | 248 |
| 1994 | 260 |
| 1995 | 257 |
| 1996 | 250 |
| 1997 | 250 |
| 1998 | 245 |
| 1999 | 284 |
| 2000 | 296 |
| 2001 | 287 |
| 2002 | 300 |
| 2003 | 300 |
| 2004 | 367 |
| 2005 | 342 |
| 2006 | 389 |
| 2007 | 368 |
| 2008 | 406 |
| 2009 | 387 |
| 2010 | 464 |
| 2011 | 433 |
| 2012 | 496 |
| 2013 | 523 |
| 2014 | 576 |
| 2015 | 554 |
| 2016 | 596 |
| 2017 | 601 |
| 2018 | 558 |
| 2019 | 571 |
| 2020 | 648 |
| 2021 | 409 |