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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1963 | 1 |
| 1964 | 8 |
| 1965 | 51 |
| 1966 | 112 |
| 1967 | 132 |
| 1968 | 143 |
| 1969 | 149 |
| 1970 | 144 |
| 1971 | 155 |
| 1972 | 131 |
| 1973 | 166 |
| 1974 | 193 |
| 1975 | 163 |
| 1976 | 193 |
| 1977 | 167 |
| 1978 | 176 |
| 1979 | 171 |
| 1980 | 170 |
| 1981 | 128 |
| 1982 | 166 |
| 1983 | 166 |
| 1984 | 174 |
| 1985 | 184 |
| 1986 | 169 |
| 1987 | 151 |
| 1988 | 150 |
| 1989 | 192 |
| 1990 | 169 |
| 1991 | 141 |
| 1992 | 128 |
| 1993 | 122 |
| 1994 | 129 |
| 1995 | 102 |
| 1996 | 99 |
| 1997 | 116 |
| 1998 | 77 |
| 1999 | 70 |
| 2000 | 59 |
| 2001 | 64 |
| 2002 | 73 |
| 2003 | 71 |
| 2004 | 64 |
| 2005 | 62 |
| 2006 | 73 |
| 2007 | 78 |
| 2008 | 80 |
| 2009 | 79 |
| 2010 | 62 |
| 2011 | 43 |
| 2012 | 72 |
| 2013 | 57 |
| 2014 | 70 |
| 2015 | 68 |
| 2016 | 61 |
| 2017 | 55 |
| 2018 | 54 |
| 2019 | 52 |
| 2020 | 48 |
| 2021 | 27 |
| 2022 | 4 |
| 2024 | 6 |