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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1957 | 2 |
| 1959 | 1 |
| 1964 | 6 |
| 1965 | 12 |
| 1966 | 10 |
| 1967 | 12 |
| 1968 | 25 |
| 1969 | 16 |
| 1970 | 13 |
| 1971 | 10 |
| 1972 | 9 |
| 1973 | 16 |
| 1974 | 33 |
| 1975 | 21 |
| 1976 | 22 |
| 1977 | 27 |
| 1978 | 24 |
| 1979 | 31 |
| 1980 | 68 |
| 1981 | 71 |
| 1982 | 98 |
| 1983 | 77 |
| 1984 | 98 |
| 1985 | 114 |
| 1986 | 142 |
| 1987 | 129 |
| 1988 | 92 |
| 1989 | 105 |
| 1990 | 134 |
| 1991 | 169 |
| 1992 | 228 |
| 1993 | 255 |
| 1994 | 237 |
| 1995 | 346 |
| 1996 | 354 |
| 1997 | 329 |
| 1998 | 295 |
| 1999 | 276 |
| 2000 | 306 |
| 2001 | 258 |
| 2002 | 284 |
| 2003 | 373 |
| 2004 | 340 |
| 2005 | 337 |
| 2006 | 373 |
| 2007 | 348 |
| 2008 | 405 |
| 2009 | 465 |
| 2010 | 563 |
| 2011 | 560 |
| 2012 | 579 |
| 2013 | 530 |
| 2014 | 608 |
| 2015 | 644 |
| 2016 | 659 |
| 2017 | 636 |
| 2018 | 638 |
| 2019 | 599 |
| 2020 | 542 |
| 2021 | 445 |
| 2022 | 74 |
| 2023 | 16 |
| 2024 | 3 |