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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1964 | 1 |
| 1965 | 2 |
| 1966 | 1 |
| 1967 | 2 |
| 1968 | 3 |
| 1969 | 12 |
| 1970 | 11 |
| 1971 | 8 |
| 1972 | 18 |
| 1973 | 9 |
| 1974 | 9 |
| 1975 | 13 |
| 1976 | 18 |
| 1977 | 17 |
| 1978 | 23 |
| 1979 | 28 |
| 1980 | 17 |
| 1981 | 16 |
| 1982 | 52 |
| 1983 | 30 |
| 1984 | 39 |
| 1985 | 53 |
| 1986 | 41 |
| 1987 | 46 |
| 1988 | 72 |
| 1989 | 117 |
| 1990 | 110 |
| 1991 | 129 |
| 1992 | 210 |
| 1993 | 241 |
| 1994 | 288 |
| 1995 | 243 |
| 1996 | 309 |
| 1997 | 361 |
| 1998 | 312 |
| 1999 | 326 |
| 2000 | 414 |
| 2001 | 429 |
| 2002 | 505 |
| 2003 | 518 |
| 2004 | 580 |
| 2005 | 646 |
| 2006 | 689 |
| 2007 | 760 |
| 2008 | 858 |
| 2009 | 1033 |
| 2010 | 1088 |
| 2011 | 1169 |
| 2012 | 1341 |
| 2013 | 1313 |
| 2014 | 1320 |
| 2015 | 1447 |
| 2016 | 1346 |
| 2017 | 1406 |
| 2018 | 1363 |
| 2019 | 1386 |
| 2020 | 1309 |
| 2021 | 1052 |
| 2022 | 496 |
| 2023 | 350 |
| 2024 | 271 |