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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1947 | 1 |
| 1949 | 1 |
| 1953 | 1 |
| 1955 | 2 |
| 1957 | 1 |
| 1958 | 2 |
| 1959 | 4 |
| 1960 | 1 |
| 1961 | 2 |
| 1962 | 4 |
| 1963 | 4 |
| 1964 | 7 |
| 1965 | 3 |
| 1966 | 6 |
| 1967 | 14 |
| 1968 | 5 |
| 1969 | 5 |
| 1970 | 4 |
| 1971 | 3 |
| 1972 | 14 |
| 1973 | 15 |
| 1974 | 73 |
| 1975 | 142 |
| 1976 | 90 |
| 1977 | 79 |
| 1978 | 79 |
| 1979 | 104 |
| 1980 | 96 |
| 1981 | 114 |
| 1982 | 127 |
| 1983 | 116 |
| 1984 | 151 |
| 1985 | 144 |
| 1986 | 168 |
| 1987 | 166 |
| 1988 | 139 |
| 1989 | 165 |
| 1990 | 201 |
| 1991 | 167 |
| 1992 | 200 |
| 1993 | 196 |
| 1994 | 171 |
| 1995 | 166 |
| 1996 | 169 |
| 1997 | 180 |
| 1998 | 220 |
| 1999 | 198 |
| 2000 | 266 |
| 2001 | 238 |
| 2002 | 258 |
| 2003 | 256 |
| 2004 | 292 |
| 2005 | 305 |
| 2006 | 282 |
| 2007 | 294 |
| 2008 | 304 |
| 2009 | 288 |
| 2010 | 294 |
| 2011 | 304 |
| 2012 | 336 |
| 2013 | 348 |
| 2014 | 281 |
| 2015 | 326 |
| 2016 | 326 |
| 2017 | 291 |
| 2018 | 263 |
| 2019 | 248 |
| 2020 | 256 |
| 2021 | 248 |
| 2022 | 247 |
| 2023 | 181 |
| 2024 | 190 |
| 2025 | 172 |
| 2026 | 2 |