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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1947 | 1 |
| 1950 | 1 |
| 1951 | 10 |
| 1952 | 23 |
| 1953 | 42 |
| 1954 | 27 |
| 1955 | 33 |
| 1956 | 23 |
| 1957 | 30 |
| 1958 | 24 |
| 1959 | 21 |
| 1964 | 1 |
| 1965 | 34 |
| 1966 | 61 |
| 1967 | 112 |
| 1968 | 112 |
| 1969 | 120 |
| 1970 | 100 |
| 1971 | 137 |
| 1972 | 110 |
| 1973 | 124 |
| 1974 | 129 |
| 1975 | 122 |
| 1976 | 135 |
| 1977 | 154 |
| 1978 | 183 |
| 1979 | 240 |
| 1980 | 226 |
| 1981 | 262 |
| 1982 | 264 |
| 1983 | 317 |
| 1984 | 355 |
| 1985 | 364 |
| 1986 | 349 |
| 1987 | 328 |
| 1988 | 311 |
| 1989 | 291 |
| 1990 | 264 |
| 1991 | 249 |
| 1992 | 238 |
| 1993 | 234 |
| 1994 | 204 |
| 1995 | 175 |
| 1996 | 171 |
| 1997 | 149 |
| 1998 | 146 |
| 1999 | 148 |
| 2000 | 162 |
| 2001 | 146 |
| 2002 | 103 |
| 2003 | 130 |
| 2004 | 100 |
| 2005 | 119 |
| 2006 | 123 |
| 2007 | 102 |
| 2008 | 110 |
| 2009 | 95 |
| 2010 | 97 |
| 2011 | 86 |
| 2012 | 78 |
| 2013 | 70 |
| 2014 | 86 |
| 2015 | 71 |
| 2016 | 76 |
| 2017 | 59 |
| 2018 | 58 |
| 2019 | 56 |
| 2020 | 40 |
| 2021 | 39 |
| 2022 | 31 |
| 2023 | 23 |
| 2024 | 26 |
| 2025 | 30 |
| 2026 | 24 |