Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1800 | 1 |
| 1801 | 1 |
| 1802 | 1 |
| 1809 | 1 |
| 1838 | 1 |
| 1842 | 1 |
| 1859 | 1 |
| 1871 | 2 |
| 1872 | 2 |
| 1873 | 4 |
| 1874 | 1 |
| 1879 | 1 |
| 1880 | 1 |
| 1881 | 1 |
| 1886 | 1 |
| 1893 | 1 |
| 1894 | 1 |
| 1896 | 1 |
| 1897 | 1 |
| 1898 | 3 |
| 1902 | 3 |
| 1904 | 1 |
| 1905 | 1 |
| 1909 | 1 |
| 1911 | 2 |
| 1912 | 1 |
| 1913 | 2 |
| 1915 | 5 |
| 1916 | 8 |
| 1918 | 1 |
| 1922 | 1 |
| 1923 | 1 |
| 1925 | 1 |
| 1927 | 2 |
| 1928 | 1 |
| 1930 | 1 |
| 1933 | 1 |
| 1934 | 1 |
| 1935 | 2 |
| 1936 | 1 |
| 1937 | 2 |
| 1939 | 1 |
| 1942 | 1 |
| 1943 | 1 |
| 1944 | 1 |
| 1945 | 4 |
| 1946 | 21 |
| 1947 | 18 |
| 1948 | 17 |
| 1949 | 22 |
| 1950 | 9 |
| 1951 | 9 |
| 1952 | 17 |
| 1953 | 23 |
| 1954 | 15 |
| 1955 | 22 |
| 1956 | 18 |
| 1957 | 25 |
| 1958 | 22 |
| 1959 | 22 |
| 1960 | 29 |
| 1961 | 36 |
| 1962 | 32 |
| 1963 | 19 |
| 1964 | 40 |
| 1965 | 35 |
| 1966 | 35 |
| 1967 | 53 |
| 1968 | 49 |
| 1969 | 61 |
| 1970 | 46 |
| 1971 | 59 |
| 1972 | 56 |
| 1973 | 53 |
| 1974 | 60 |
| 1975 | 67 |
| 1976 | 67 |
| 1977 | 59 |
| 1978 | 91 |
| 1979 | 96 |
| 1980 | 69 |
| 1981 | 78 |
| 1982 | 73 |
| 1983 | 71 |
| 1984 | 105 |
| 1985 | 94 |
| 1986 | 100 |
| 1987 | 95 |
| 1988 | 112 |
| 1989 | 127 |
| 1990 | 117 |
| 1991 | 136 |
| 1992 | 139 |
| 1993 | 136 |
| 1994 | 132 |
| 1995 | 209 |
| 1996 | 215 |
| 1997 | 197 |
| 1998 | 234 |
| 1999 | 209 |
| 2000 | 200 |
| 2001 | 195 |
| 2002 | 216 |
| 2003 | 217 |
| 2004 | 240 |
| 2005 | 227 |
| 2006 | 231 |
| 2007 | 272 |
| 2008 | 281 |
| 2009 | 302 |
| 2010 | 305 |
| 2011 | 304 |
| 2012 | 359 |
| 2013 | 328 |
| 2014 | 388 |
| 2015 | 392 |
| 2016 | 436 |
| 2017 | 437 |
| 2018 | 459 |
| 2019 | 429 |
| 2020 | 571 |
| 2021 | 328 |