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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1964 | 63 |
| 1965 | 61 |
| 1966 | 65 |
| 1967 | 59 |
| 1968 | 90 |
| 1969 | 110 |
| 1970 | 124 |
| 1971 | 141 |
| 1972 | 167 |
| 1973 | 158 |
| 1974 | 138 |
| 1975 | 252 |
| 1976 | 197 |
| 1977 | 212 |
| 1978 | 207 |
| 1979 | 220 |
| 1980 | 181 |
| 1981 | 180 |
| 1982 | 188 |
| 1983 | 185 |
| 1984 | 193 |
| 1985 | 183 |
| 1986 | 222 |
| 1987 | 232 |
| 1988 | 311 |
| 1989 | 299 |
| 1990 | 276 |
| 1991 | 303 |
| 1992 | 331 |
| 1993 | 299 |
| 1994 | 321 |
| 1995 | 293 |
| 1996 | 273 |
| 1997 | 254 |
| 1998 | 292 |
| 1999 | 306 |
| 2000 | 324 |
| 2001 | 285 |
| 2002 | 259 |
| 2003 | 269 |
| 2004 | 284 |
| 2005 | 278 |
| 2006 | 221 |
| 2007 | 189 |
| 2008 | 240 |
| 2009 | 298 |
| 2010 | 280 |
| 2011 | 306 |
| 2012 | 347 |
| 2013 | 341 |
| 2014 | 329 |
| 2015 | 331 |
| 2016 | 359 |
| 2017 | 291 |
| 2018 | 291 |
| 2019 | 282 |
| 2020 | 407 |
| 2021 | 361 |
| 2022 | 257 |
| 2023 | 274 |