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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1967 | 1 |
| 1968 | 6 |
| 1969 | 16 |
| 1970 | 34 |
| 1971 | 29 |
| 1972 | 39 |
| 1973 | 20 |
| 1974 | 42 |
| 1975 | 60 |
| 1976 | 69 |
| 1977 | 51 |
| 1978 | 77 |
| 1979 | 92 |
| 1980 | 103 |
| 1981 | 105 |
| 1982 | 149 |
| 1983 | 165 |
| 1984 | 193 |
| 1985 | 200 |
| 1986 | 196 |
| 1987 | 211 |
| 1988 | 174 |
| 1989 | 189 |
| 1990 | 216 |
| 1991 | 222 |
| 1992 | 199 |
| 1993 | 173 |
| 1994 | 190 |
| 1995 | 177 |
| 1996 | 150 |
| 1997 | 151 |
| 1998 | 116 |
| 1999 | 139 |
| 2000 | 142 |
| 2001 | 125 |
| 2002 | 139 |
| 2003 | 99 |
| 2004 | 153 |
| 2005 | 146 |
| 2006 | 161 |
| 2007 | 141 |
| 2008 | 127 |
| 2009 | 134 |
| 2010 | 131 |
| 2011 | 150 |
| 2012 | 165 |
| 2013 | 146 |
| 2014 | 110 |
| 2015 | 118 |
| 2016 | 97 |
| 2017 | 113 |
| 2018 | 78 |
| 2019 | 78 |
| 2020 | 82 |
| 2021 | 76 |
| 2022 | 64 |
| 2023 | 48 |
| 2024 | 25 |