Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1841 | 1 |
| 1843 | 1 |
| 1846 | 2 |
| 1869 | 1 |
| 1880 | 2 |
| 1897 | 1 |
| 1899 | 1 |
| 1900 | 2 |
| 1901 | 1 |
| 1902 | 1 |
| 1907 | 1 |
| 1910 | 1 |
| 1912 | 1 |
| 1913 | 3 |
| 1917 | 2 |
| 1920 | 1 |
| 1922 | 2 |
| 1923 | 2 |
| 1925 | 3 |
| 1926 | 2 |
| 1927 | 1 |
| 1929 | 1 |
| 1931 | 2 |
| 1932 | 3 |
| 1933 | 2 |
| 1934 | 1 |
| 1935 | 2 |
| 1936 | 3 |
| 1937 | 4 |
| 1938 | 1 |
| 1939 | 1 |
| 1941 | 4 |
| 1942 | 2 |
| 1943 | 4 |
| 1944 | 1 |
| 1945 | 5 |
| 1946 | 16 |
| 1947 | 10 |
| 1948 | 18 |
| 1949 | 15 |
| 1950 | 11 |
| 1951 | 13 |
| 1952 | 15 |
| 1953 | 22 |
| 1954 | 12 |
| 1955 | 27 |
| 1956 | 12 |
| 1957 | 12 |
| 1958 | 17 |
| 1959 | 22 |
| 1960 | 10 |
| 1961 | 10 |
| 1962 | 11 |
| 1963 | 16 |
| 1964 | 17 |
| 1965 | 25 |
| 1966 | 25 |
| 1967 | 21 |
| 1968 | 22 |
| 1969 | 24 |
| 1970 | 33 |
| 1971 | 36 |
| 1972 | 24 |
| 1973 | 27 |
| 1974 | 26 |
| 1975 | 25 |
| 1976 | 28 |
| 1977 | 24 |
| 1978 | 24 |
| 1979 | 28 |
| 1980 | 28 |
| 1981 | 33 |
| 1982 | 29 |
| 1983 | 34 |
| 1984 | 34 |
| 1985 | 43 |
| 1986 | 33 |
| 1987 | 30 |
| 1988 | 35 |
| 1989 | 28 |
| 1990 | 27 |
| 1991 | 27 |
| 1992 | 21 |
| 1993 | 34 |
| 1994 | 19 |
| 1995 | 21 |
| 1996 | 23 |
| 1997 | 30 |
| 1998 | 20 |
| 1999 | 25 |
| 2000 | 30 |
| 2001 | 31 |
| 2002 | 34 |
| 2003 | 32 |
| 2004 | 31 |
| 2005 | 26 |
| 2006 | 36 |
| 2007 | 26 |
| 2008 | 38 |
| 2009 | 31 |
| 2010 | 41 |
| 2011 | 44 |
| 2012 | 56 |
| 2013 | 58 |
| 2014 | 56 |
| 2015 | 68 |
| 2016 | 62 |
| 2017 | 71 |
| 2018 | 74 |
| 2019 | 81 |
| 2020 | 79 |
| 2021 | 43 |