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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1808 | 1 |
| 1821 | 1 |
| 1876 | 1 |
| 1878 | 3 |
| 1880 | 1 |
| 1881 | 1 |
| 1931 | 1 |
| 1932 | 2 |
| 1933 | 1 |
| 1936 | 1 |
| 1937 | 2 |
| 1939 | 2 |
| 1940 | 1 |
| 1942 | 1 |
| 1943 | 1 |
| 1944 | 1 |
| 1945 | 4 |
| 1946 | 17 |
| 1947 | 21 |
| 1948 | 16 |
| 1949 | 9 |
| 1950 | 19 |
| 1951 | 17 |
| 1952 | 9 |
| 1953 | 14 |
| 1954 | 14 |
| 1955 | 16 |
| 1956 | 10 |
| 1957 | 11 |
| 1958 | 12 |
| 1959 | 13 |
| 1960 | 14 |
| 1961 | 16 |
| 1962 | 18 |
| 1963 | 17 |
| 1964 | 20 |
| 1965 | 23 |
| 1966 | 28 |
| 1967 | 40 |
| 1968 | 27 |
| 1969 | 32 |
| 1970 | 52 |
| 1971 | 53 |
| 1972 | 64 |
| 1973 | 56 |
| 1974 | 72 |
| 1975 | 57 |
| 1976 | 64 |
| 1977 | 70 |
| 1978 | 79 |
| 1979 | 77 |
| 1980 | 76 |
| 1981 | 87 |
| 1982 | 97 |
| 1983 | 100 |
| 1984 | 100 |
| 1985 | 114 |
| 1986 | 121 |
| 1987 | 118 |
| 1988 | 108 |
| 1989 | 137 |
| 1990 | 143 |
| 1991 | 145 |
| 1992 | 150 |
| 1993 | 175 |
| 1994 | 147 |
| 1995 | 138 |
| 1996 | 124 |
| 1997 | 145 |
| 1998 | 120 |
| 1999 | 159 |
| 2000 | 157 |
| 2001 | 147 |
| 2002 | 155 |
| 2003 | 209 |
| 2004 | 212 |
| 2005 | 242 |
| 2006 | 245 |
| 2007 | 244 |
| 2008 | 251 |
| 2009 | 279 |
| 2010 | 341 |
| 2011 | 329 |
| 2012 | 367 |
| 2013 | 354 |
| 2014 | 381 |
| 2015 | 400 |
| 2016 | 381 |
| 2017 | 373 |
| 2018 | 375 |
| 2019 | 372 |
| 2020 | 382 |
| 2021 | 406 |
| 2022 | 316 |