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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1955 | 1 |
| 1956 | 3 |
| 1957 | 3 |
| 1960 | 3 |
| 1963 | 4 |
| 1964 | 51 |
| 1965 | 73 |
| 1966 | 99 |
| 1967 | 124 |
| 1968 | 158 |
| 1969 | 131 |
| 1970 | 141 |
| 1971 | 195 |
| 1972 | 239 |
| 1973 | 280 |
| 1974 | 371 |
| 1975 | 489 |
| 1976 | 593 |
| 1977 | 583 |
| 1978 | 725 |
| 1979 | 757 |
| 1980 | 1015 |
| 1981 | 990 |
| 1982 | 1017 |
| 1983 | 1164 |
| 1984 | 1193 |
| 1985 | 1323 |
| 1986 | 1332 |
| 1987 | 1305 |
| 1988 | 1248 |
| 1989 | 1482 |
| 1990 | 1438 |
| 1991 | 1420 |
| 1992 | 1371 |
| 1993 | 1371 |
| 1994 | 1303 |
| 1995 | 1239 |
| 1996 | 1167 |
| 1997 | 1147 |
| 1998 | 1056 |
| 1999 | 1049 |
| 2000 | 983 |
| 2001 | 960 |
| 2002 | 936 |
| 2003 | 913 |
| 2004 | 887 |
| 2005 | 908 |
| 2006 | 931 |
| 2007 | 960 |
| 2008 | 894 |
| 2009 | 852 |
| 2010 | 847 |
| 2011 | 824 |
| 2012 | 850 |
| 2013 | 770 |
| 2014 | 773 |
| 2015 | 777 |
| 2016 | 713 |
| 2017 | 718 |
| 2018 | 671 |
| 2019 | 695 |
| 2020 | 732 |
| 2021 | 655 |
| 2022 | 566 |
| 2023 | 61 |