Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1864 | 1 |
| 1880 | 1 |
| 1883 | 7 |
| 1884 | 8 |
| 1885 | 2 |
| 1886 | 7 |
| 1887 | 5 |
| 1888 | 2 |
| 1890 | 2 |
| 1891 | 1 |
| 1892 | 3 |
| 1893 | 2 |
| 1895 | 26 |
| 1896 | 23 |
| 1897 | 25 |
| 1898 | 13 |
| 1899 | 1 |
| 1900 | 15 |
| 1901 | 23 |
| 1902 | 9 |
| 1903 | 7 |
| 1904 | 3 |
| 1905 | 2 |
| 1906 | 1 |
| 1907 | 2 |
| 1908 | 1 |
| 1910 | 2 |
| 1912 | 3 |
| 1915 | 4 |
| 1916 | 6 |
| 1917 | 5 |
| 1918 | 5 |
| 1919 | 6 |
| 1920 | 2 |
| 1921 | 3 |
| 1922 | 5 |
| 1923 | 3 |
| 1924 | 5 |
| 1925 | 10 |
| 1926 | 4 |
| 1927 | 3 |
| 1928 | 9 |
| 1929 | 2 |
| 1930 | 5 |
| 1931 | 4 |
| 1932 | 3 |
| 1934 | 2 |
| 1935 | 1 |
| 1936 | 1 |
| 1940 | 3 |
| 1941 | 3 |
| 1942 | 1 |
| 1944 | 2 |
| 1945 | 2 |
| 1946 | 6 |
| 1947 | 22 |
| 1948 | 14 |
| 1949 | 7 |
| 1950 | 9 |
| 1951 | 10 |
| 1952 | 7 |
| 1953 | 9 |
| 1954 | 14 |
| 1955 | 12 |
| 1956 | 12 |
| 1957 | 12 |
| 1958 | 10 |
| 1959 | 13 |
| 1960 | 7 |
| 1961 | 14 |
| 1962 | 8 |
| 1963 | 12 |
| 1964 | 22 |
| 1965 | 19 |
| 1966 | 19 |
| 1967 | 25 |
| 1968 | 37 |
| 1969 | 45 |
| 1970 | 30 |
| 1971 | 46 |
| 1972 | 45 |
| 1973 | 37 |
| 1974 | 33 |
| 1975 | 36 |
| 1976 | 31 |
| 1977 | 39 |
| 1978 | 52 |
| 1979 | 40 |
| 1980 | 38 |
| 1981 | 43 |
| 1982 | 35 |
| 1983 | 31 |
| 1984 | 32 |
| 1985 | 37 |
| 1986 | 44 |
| 1987 | 38 |
| 1988 | 40 |
| 1989 | 37 |
| 1990 | 52 |
| 1991 | 48 |
| 1992 | 46 |
| 1993 | 51 |
| 1994 | 71 |
| 1995 | 44 |
| 1996 | 45 |
| 1997 | 39 |
| 1998 | 49 |
| 1999 | 46 |
| 2000 | 31 |
| 2001 | 35 |
| 2002 | 40 |
| 2003 | 51 |
| 2004 | 41 |
| 2005 | 53 |
| 2006 | 54 |
| 2007 | 56 |
| 2008 | 53 |
| 2009 | 47 |
| 2010 | 49 |
| 2011 | 57 |
| 2012 | 75 |
| 2013 | 60 |
| 2014 | 56 |
| 2015 | 70 |
| 2016 | 71 |
| 2017 | 79 |
| 2018 | 61 |
| 2019 | 80 |
| 2020 | 80 |
| 2021 | 41 |