Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1797 | 1 |
| 1819 | 1 |
| 1826 | 1 |
| 1828 | 1 |
| 1851 | 1 |
| 1867 | 1 |
| 1873 | 2 |
| 1874 | 1 |
| 1876 | 5 |
| 1877 | 5 |
| 1878 | 2 |
| 1879 | 1 |
| 1881 | 2 |
| 1898 | 1 |
| 1905 | 1 |
| 1906 | 1 |
| 1909 | 1 |
| 1911 | 1 |
| 1912 | 1 |
| 1914 | 1 |
| 1915 | 4 |
| 1920 | 2 |
| 1921 | 1 |
| 1922 | 4 |
| 1924 | 1 |
| 1926 | 1 |
| 1927 | 2 |
| 1928 | 1 |
| 1932 | 1 |
| 1936 | 1 |
| 1937 | 1 |
| 1939 | 1 |
| 1940 | 1 |
| 1942 | 3 |
| 1943 | 1 |
| 1945 | 1 |
| 1946 | 4 |
| 1947 | 4 |
| 1948 | 1 |
| 1949 | 3 |
| 1950 | 4 |
| 1951 | 4 |
| 1952 | 6 |
| 1953 | 2 |
| 1954 | 5 |
| 1956 | 5 |
| 1957 | 7 |
| 1958 | 9 |
| 1959 | 3 |
| 1960 | 7 |
| 1961 | 5 |
| 1962 | 4 |
| 1963 | 11 |
| 1964 | 7 |
| 1965 | 13 |
| 1966 | 12 |
| 1967 | 23 |
| 1968 | 12 |
| 1969 | 12 |
| 1970 | 15 |
| 1971 | 15 |
| 1972 | 20 |
| 1973 | 24 |
| 1974 | 21 |
| 1975 | 29 |
| 1976 | 47 |
| 1977 | 33 |
| 1978 | 41 |
| 1979 | 41 |
| 1980 | 51 |
| 1981 | 55 |
| 1982 | 67 |
| 1983 | 68 |
| 1984 | 71 |
| 1985 | 67 |
| 1986 | 80 |
| 1987 | 66 |
| 1988 | 75 |
| 1989 | 62 |
| 1990 | 93 |
| 1991 | 71 |
| 1992 | 87 |
| 1993 | 71 |
| 1994 | 101 |
| 1995 | 108 |
| 1996 | 102 |
| 1997 | 92 |
| 1998 | 105 |
| 1999 | 96 |
| 2000 | 115 |
| 2001 | 112 |
| 2002 | 119 |
| 2003 | 128 |
| 2004 | 163 |
| 2005 | 147 |
| 2006 | 162 |
| 2007 | 157 |
| 2008 | 200 |
| 2009 | 211 |
| 2010 | 232 |
| 2011 | 243 |
| 2012 | 257 |
| 2013 | 263 |
| 2014 | 252 |
| 2015 | 278 |
| 2016 | 281 |
| 2017 | 284 |
| 2018 | 319 |
| 2019 | 279 |
| 2020 | 340 |
| 2021 | 208 |