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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1840 | 1 |
| 1844 | 1 |
| 1855 | 1 |
| 1856 | 1 |
| 1857 | 1 |
| 1858 | 3 |
| 1859 | 2 |
| 1864 | 1 |
| 1868 | 3 |
| 1870 | 2 |
| 1871 | 1 |
| 1874 | 1 |
| 1875 | 3 |
| 1876 | 7 |
| 1879 | 8 |
| 1880 | 2 |
| 1881 | 3 |
| 1883 | 5 |
| 1884 | 4 |
| 1885 | 5 |
| 1886 | 6 |
| 1887 | 10 |
| 1888 | 5 |
| 1889 | 3 |
| 1890 | 5 |
| 1891 | 7 |
| 1892 | 8 |
| 1893 | 4 |
| 1894 | 14 |
| 1895 | 4 |
| 1896 | 10 |
| 1897 | 7 |
| 1898 | 10 |
| 1899 | 2 |
| 1900 | 6 |
| 1901 | 3 |
| 1902 | 3 |
| 1903 | 5 |
| 1904 | 4 |
| 1905 | 5 |
| 1906 | 3 |
| 1907 | 7 |
| 1908 | 1 |
| 1909 | 5 |
| 1910 | 3 |
| 1911 | 8 |
| 1912 | 4 |
| 1913 | 6 |
| 1914 | 6 |
| 1915 | 9 |
| 1916 | 3 |
| 1917 | 8 |
| 1918 | 3 |
| 1919 | 4 |
| 1920 | 4 |
| 1921 | 6 |
| 1922 | 6 |
| 1923 | 6 |
| 1924 | 4 |
| 1925 | 4 |
| 1926 | 6 |
| 1927 | 4 |
| 1928 | 4 |
| 1929 | 6 |
| 1930 | 6 |
| 1931 | 3 |
| 1932 | 3 |
| 1933 | 5 |
| 1934 | 1 |
| 1935 | 5 |
| 1936 | 2 |
| 1937 | 3 |
| 1938 | 1 |
| 1939 | 1 |
| 1940 | 5 |
| 1941 | 3 |
| 1942 | 1 |
| 1943 | 2 |
| 1944 | 1 |
| 1945 | 7 |
| 1946 | 15 |
| 1947 | 17 |
| 1948 | 24 |
| 1949 | 20 |
| 1950 | 23 |
| 1951 | 32 |
| 1952 | 29 |
| 1953 | 21 |
| 1954 | 20 |
| 1955 | 31 |
| 1956 | 31 |
| 1957 | 38 |
| 1958 | 42 |
| 1959 | 29 |
| 1960 | 36 |
| 1961 | 46 |
| 1962 | 45 |
| 1963 | 41 |
| 1964 | 49 |
| 1965 | 50 |
| 1966 | 57 |
| 1967 | 59 |
| 1968 | 67 |
| 1969 | 86 |
| 1970 | 80 |
| 1971 | 103 |
| 1972 | 107 |
| 1973 | 105 |
| 1974 | 93 |
| 1975 | 124 |
| 1976 | 135 |
| 1977 | 145 |
| 1978 | 141 |
| 1979 | 137 |
| 1980 | 132 |
| 1981 | 134 |
| 1982 | 169 |
| 1983 | 132 |
| 1984 | 193 |
| 1985 | 180 |
| 1986 | 149 |
| 1987 | 194 |
| 1988 | 170 |
| 1989 | 194 |
| 1990 | 218 |
| 1991 | 245 |
| 1992 | 225 |
| 1993 | 227 |
| 1994 | 239 |
| 1995 | 232 |
| 1996 | 262 |
| 1997 | 259 |
| 1998 | 269 |
| 1999 | 308 |
| 2000 | 357 |
| 2001 | 392 |
| 2002 | 358 |
| 2003 | 406 |
| 2004 | 473 |
| 2005 | 542 |
| 2006 | 576 |
| 2007 | 647 |
| 2008 | 720 |
| 2009 | 763 |
| 2010 | 886 |
| 2011 | 952 |
| 2012 | 941 |
| 2013 | 951 |
| 2014 | 1068 |
| 2015 | 1316 |
| 2016 | 1381 |
| 2017 | 1364 |
| 2018 | 1425 |
| 2019 | 1614 |
| 2020 | 1662 |
| 2021 | 1692 |
| 2022 | 1630 |
| 2023 | 1540 |
| 2024 | 1574 |
| 2025 | 1602 |
| 2026 | 518 |
| 2027 | 1 |