Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1800 | 1 |
| 1861 | 1 |
| 1864 | 2 |
| 1865 | 2 |
| 1866 | 1 |
| 1867 | 1 |
| 1868 | 3 |
| 1869 | 1 |
| 1870 | 1 |
| 1872 | 1 |
| 1873 | 2 |
| 1876 | 4 |
| 1878 | 1 |
| 1879 | 2 |
| 1881 | 1 |
| 1885 | 1 |
| 1888 | 1 |
| 1889 | 1 |
| 1890 | 1 |
| 1893 | 1 |
| 1894 | 2 |
| 1899 | 2 |
| 1908 | 1 |
| 1909 | 4 |
| 1910 | 2 |
| 1911 | 2 |
| 1912 | 1 |
| 1913 | 3 |
| 1916 | 2 |
| 1917 | 1 |
| 1923 | 1 |
| 1924 | 1 |
| 1926 | 1 |
| 1927 | 1 |
| 1928 | 1 |
| 1934 | 1 |
| 1946 | 2 |
| 1947 | 4 |
| 1948 | 2 |
| 1950 | 2 |
| 1951 | 6 |
| 1952 | 4 |
| 1953 | 3 |
| 1954 | 4 |
| 1955 | 3 |
| 1956 | 2 |
| 1957 | 2 |
| 1959 | 1 |
| 1960 | 2 |
| 1961 | 2 |
| 1962 | 3 |
| 1963 | 5 |
| 1964 | 3 |
| 1965 | 1 |
| 1966 | 3 |
| 1967 | 1 |
| 1968 | 8 |
| 1969 | 15 |
| 1970 | 3 |
| 1971 | 7 |
| 1972 | 8 |
| 1973 | 5 |
| 1974 | 12 |
| 1975 | 7 |
| 1976 | 15 |
| 1977 | 11 |
| 1978 | 11 |
| 1979 | 15 |
| 1980 | 16 |
| 1981 | 28 |
| 1982 | 15 |
| 1983 | 16 |
| 1984 | 17 |
| 1985 | 15 |
| 1986 | 12 |
| 1987 | 11 |
| 1988 | 19 |
| 1989 | 20 |
| 1990 | 11 |
| 1991 | 14 |
| 1992 | 7 |
| 1993 | 20 |
| 1994 | 18 |
| 1995 | 19 |
| 1996 | 22 |
| 1997 | 13 |
| 1998 | 17 |
| 1999 | 23 |
| 2000 | 28 |
| 2001 | 25 |
| 2002 | 30 |
| 2003 | 32 |
| 2004 | 46 |
| 2005 | 37 |
| 2006 | 35 |
| 2007 | 35 |
| 2008 | 30 |
| 2009 | 43 |
| 2010 | 45 |
| 2011 | 38 |
| 2012 | 42 |
| 2013 | 46 |
| 2014 | 61 |
| 2015 | 52 |
| 2016 | 66 |
| 2017 | 63 |
| 2018 | 57 |
| 2019 | 58 |
| 2020 | 70 |
| 2021 | 45 |