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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1951 | 4 |
| 1952 | 7 |
| 1953 | 25 |
| 1954 | 23 |
| 1955 | 26 |
| 1956 | 35 |
| 1957 | 38 |
| 1958 | 35 |
| 1959 | 25 |
| 1960 | 54 |
| 1961 | 52 |
| 1962 | 44 |
| 1964 | 2 |
| 1965 | 5 |
| 1966 | 92 |
| 1967 | 120 |
| 1968 | 171 |
| 1969 | 150 |
| 1970 | 147 |
| 1971 | 170 |
| 1972 | 143 |
| 1973 | 177 |
| 1974 | 153 |
| 1975 | 153 |
| 1976 | 149 |
| 1977 | 130 |
| 1978 | 138 |
| 1979 | 141 |
| 1980 | 109 |
| 1981 | 117 |
| 1982 | 110 |
| 1983 | 115 |
| 1984 | 120 |
| 1985 | 120 |
| 1986 | 127 |
| 1987 | 111 |
| 1988 | 129 |
| 1989 | 133 |
| 1990 | 101 |
| 1991 | 96 |
| 1992 | 85 |
| 1993 | 86 |
| 1994 | 118 |
| 1995 | 103 |
| 1996 | 66 |
| 1997 | 95 |
| 1998 | 96 |
| 1999 | 96 |
| 2000 | 83 |
| 2001 | 78 |
| 2002 | 75 |
| 2003 | 77 |
| 2004 | 67 |
| 2005 | 70 |
| 2006 | 58 |
| 2007 | 61 |
| 2008 | 54 |
| 2009 | 52 |
| 2010 | 70 |
| 2011 | 71 |
| 2012 | 79 |
| 2013 | 97 |
| 2014 | 88 |
| 2015 | 98 |
| 2016 | 80 |
| 2017 | 78 |
| 2018 | 56 |
| 2019 | 65 |
| 2020 | 67 |
| 2021 | 40 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 3 |