Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1826 | 2 |
| 1829 | 1 |
| 1831 | 3 |
| 1832 | 2 |
| 1835 | 2 |
| 1839 | 1 |
| 1840 | 1 |
| 1843 | 1 |
| 1844 | 2 |
| 1845 | 3 |
| 1846 | 3 |
| 1896 | 1 |
| 1897 | 1 |
| 1901 | 1 |
| 1912 | 1 |
| 1913 | 1 |
| 1917 | 1 |
| 1918 | 2 |
| 1919 | 3 |
| 1920 | 1 |
| 1921 | 2 |
| 1923 | 1 |
| 1926 | 2 |
| 1927 | 1 |
| 1931 | 1 |
| 1932 | 1 |
| 1934 | 1 |
| 1947 | 4 |
| 1948 | 3 |
| 1949 | 1 |
| 1951 | 3 |
| 1952 | 2 |
| 1953 | 2 |
| 1955 | 2 |
| 1956 | 2 |
| 1957 | 1 |
| 1958 | 4 |
| 1959 | 6 |
| 1960 | 1 |
| 1961 | 2 |
| 1962 | 2 |
| 1963 | 3 |
| 1964 | 7 |
| 1965 | 3 |
| 1966 | 8 |
| 1967 | 5 |
| 1968 | 12 |
| 1969 | 8 |
| 1970 | 12 |
| 1971 | 16 |
| 1972 | 18 |
| 1973 | 27 |
| 1974 | 17 |
| 1975 | 19 |
| 1976 | 18 |
| 1977 | 25 |
| 1978 | 17 |
| 1979 | 27 |
| 1980 | 33 |
| 1981 | 40 |
| 1982 | 39 |
| 1983 | 35 |
| 1984 | 44 |
| 1985 | 43 |
| 1986 | 41 |
| 1987 | 36 |
| 1988 | 49 |
| 1989 | 31 |
| 1990 | 41 |
| 1991 | 46 |
| 1992 | 56 |
| 1993 | 51 |
| 1994 | 56 |
| 1995 | 57 |
| 1996 | 58 |
| 1997 | 61 |
| 1998 | 68 |
| 1999 | 58 |
| 2000 | 81 |
| 2001 | 80 |
| 2002 | 70 |
| 2003 | 65 |
| 2004 | 101 |
| 2005 | 97 |
| 2006 | 85 |
| 2007 | 128 |
| 2008 | 94 |
| 2009 | 85 |
| 2010 | 96 |
| 2011 | 100 |
| 2012 | 131 |
| 2013 | 123 |
| 2014 | 107 |
| 2015 | 166 |
| 2016 | 164 |
| 2017 | 164 |
| 2018 | 153 |
| 2019 | 129 |
| 2020 | 176 |
| 2021 | 101 |