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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1967 | 1 |
| 1968 | 1 |
| 1969 | 2 |
| 1970 | 3 |
| 1971 | 3 |
| 1972 | 5 |
| 1973 | 6 |
| 1974 | 6 |
| 1975 | 13 |
| 1976 | 7 |
| 1977 | 18 |
| 1978 | 17 |
| 1979 | 24 |
| 1980 | 23 |
| 1981 | 18 |
| 1982 | 26 |
| 1983 | 22 |
| 1984 | 19 |
| 1985 | 18 |
| 1986 | 13 |
| 1987 | 38 |
| 1988 | 21 |
| 1989 | 40 |
| 1990 | 59 |
| 1991 | 63 |
| 1992 | 69 |
| 1993 | 56 |
| 1994 | 75 |
| 1995 | 93 |
| 1996 | 67 |
| 1997 | 82 |
| 1998 | 115 |
| 1999 | 122 |
| 2000 | 107 |
| 2001 | 168 |
| 2002 | 169 |
| 2003 | 159 |
| 2004 | 126 |
| 2005 | 117 |
| 2006 | 142 |
| 2007 | 167 |
| 2008 | 134 |
| 2009 | 157 |
| 2010 | 191 |
| 2011 | 210 |
| 2012 | 207 |
| 2013 | 228 |
| 2014 | 231 |
| 2015 | 210 |
| 2016 | 223 |
| 2017 | 209 |
| 2018 | 228 |
| 2019 | 229 |
| 2020 | 215 |
| 2021 | 97 |
| 2022 | 14 |
| 2023 | 6 |
| 2024 | 79 |
| 2025 | 98 |