Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1817 | 1 |
| 1828 | 1 |
| 1829 | 2 |
| 1831 | 1 |
| 1832 | 1 |
| 1835 | 3 |
| 1838 | 1 |
| 1839 | 3 |
| 1845 | 1 |
| 1849 | 2 |
| 1850 | 2 |
| 1851 | 3 |
| 1852 | 2 |
| 1853 | 1 |
| 1855 | 1 |
| 1857 | 1 |
| 1858 | 2 |
| 1860 | 2 |
| 1861 | 1 |
| 1862 | 1 |
| 1863 | 3 |
| 1865 | 1 |
| 1868 | 1 |
| 1875 | 7 |
| 1877 | 2 |
| 1878 | 1 |
| 1879 | 1 |
| 1882 | 1 |
| 1884 | 1 |
| 1895 | 1 |
| 1896 | 1 |
| 1914 | 1 |
| 1915 | 1 |
| 1916 | 1 |
| 1917 | 1 |
| 1919 | 1 |
| 1935 | 1 |
| 1936 | 1 |
| 1941 | 1 |
| 1944 | 5 |
| 1945 | 1 |
| 1946 | 7 |
| 1947 | 6 |
| 1948 | 3 |
| 1949 | 5 |
| 1950 | 2 |
| 1951 | 5 |
| 1952 | 7 |
| 1953 | 10 |
| 1954 | 5 |
| 1955 | 12 |
| 1956 | 8 |
| 1957 | 4 |
| 1958 | 11 |
| 1959 | 4 |
| 1960 | 10 |
| 1961 | 8 |
| 1962 | 11 |
| 1963 | 16 |
| 1964 | 10 |
| 1965 | 12 |
| 1966 | 22 |
| 1967 | 17 |
| 1968 | 14 |
| 1969 | 31 |
| 1970 | 24 |
| 1971 | 25 |
| 1972 | 37 |
| 1973 | 26 |
| 1974 | 47 |
| 1975 | 45 |
| 1976 | 41 |
| 1977 | 39 |
| 1978 | 31 |
| 1979 | 37 |
| 1980 | 42 |
| 1981 | 55 |
| 1982 | 59 |
| 1983 | 63 |
| 1984 | 79 |
| 1985 | 75 |
| 1986 | 72 |
| 1987 | 91 |
| 1988 | 111 |
| 1989 | 93 |
| 1990 | 99 |
| 1991 | 107 |
| 1992 | 87 |
| 1993 | 89 |
| 1994 | 114 |
| 1995 | 110 |
| 1996 | 149 |
| 1997 | 141 |
| 1998 | 163 |
| 1999 | 128 |
| 2000 | 159 |
| 2001 | 179 |
| 2002 | 181 |
| 2003 | 217 |
| 2004 | 232 |
| 2005 | 239 |
| 2006 | 230 |
| 2007 | 228 |
| 2008 | 294 |
| 2009 | 329 |
| 2010 | 354 |
| 2011 | 401 |
| 2012 | 465 |
| 2013 | 490 |
| 2014 | 473 |
| 2015 | 496 |
| 2016 | 536 |
| 2017 | 512 |
| 2018 | 493 |
| 2019 | 542 |
| 2020 | 665 |
| 2021 | 369 |