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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1971 | 1 |
| 1975 | 8 |
| 1976 | 10 |
| 1977 | 11 |
| 1978 | 13 |
| 1979 | 16 |
| 1980 | 13 |
| 1981 | 17 |
| 1982 | 19 |
| 1983 | 17 |
| 1984 | 13 |
| 1985 | 17 |
| 1986 | 17 |
| 1987 | 16 |
| 1988 | 27 |
| 1989 | 19 |
| 1990 | 25 |
| 1991 | 33 |
| 1992 | 25 |
| 1993 | 51 |
| 1994 | 34 |
| 1995 | 25 |
| 1996 | 39 |
| 1997 | 30 |
| 1998 | 33 |
| 1999 | 39 |
| 2000 | 53 |
| 2001 | 76 |
| 2002 | 79 |
| 2003 | 57 |
| 2004 | 149 |
| 2005 | 173 |
| 2006 | 216 |
| 2007 | 250 |
| 2008 | 226 |
| 2009 | 215 |
| 2010 | 257 |
| 2011 | 214 |
| 2012 | 272 |
| 2013 | 266 |
| 2014 | 228 |
| 2015 | 247 |
| 2016 | 188 |
| 2017 | 153 |
| 2018 | 161 |
| 2019 | 170 |
| 2020 | 151 |
| 2021 | 102 |
| 2022 | 52 |
| 2023 | 31 |
| 2024 | 25 |