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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1951 | 1 |
| 1952 | 1 |
| 1955 | 1 |
| 1957 | 1 |
| 1960 | 2 |
| 1962 | 3 |
| 1966 | 5 |
| 1967 | 15 |
| 1968 | 9 |
| 1969 | 28 |
| 1970 | 24 |
| 1971 | 24 |
| 1972 | 44 |
| 1973 | 28 |
| 1974 | 51 |
| 1975 | 46 |
| 1976 | 31 |
| 1977 | 42 |
| 1978 | 26 |
| 1979 | 34 |
| 1980 | 29 |
| 1981 | 31 |
| 1982 | 29 |
| 1983 | 41 |
| 1984 | 51 |
| 1985 | 49 |
| 1986 | 36 |
| 1987 | 30 |
| 1988 | 27 |
| 1989 | 46 |
| 1990 | 14 |
| 1991 | 53 |
| 1992 | 25 |
| 1993 | 36 |
| 1994 | 57 |
| 1995 | 41 |
| 1996 | 52 |
| 1997 | 53 |
| 1998 | 49 |
| 1999 | 62 |
| 2000 | 61 |
| 2001 | 61 |
| 2002 | 64 |
| 2003 | 82 |
| 2004 | 83 |
| 2005 | 132 |
| 2006 | 133 |
| 2007 | 144 |
| 2008 | 134 |
| 2009 | 123 |
| 2010 | 158 |
| 2011 | 155 |
| 2012 | 159 |
| 2013 | 166 |
| 2014 | 170 |
| 2015 | 148 |
| 2016 | 136 |
| 2017 | 135 |
| 2018 | 86 |
| 2019 | 97 |
| 2020 | 51 |
| 2021 | 10 |
| 2022 | 2 |
| 2024 | 3 |