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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1965 | 1 |
| 1968 | 1 |
| 1970 | 11 |
| 1975 | 31 |
| 1976 | 44 |
| 1977 | 66 |
| 1978 | 118 |
| 1979 | 152 |
| 1980 | 56 |
| 1981 | 43 |
| 1982 | 54 |
| 1983 | 72 |
| 1984 | 71 |
| 1985 | 56 |
| 1986 | 45 |
| 1987 | 52 |
| 1988 | 38 |
| 1989 | 56 |
| 1990 | 53 |
| 1991 | 40 |
| 1992 | 57 |
| 2006 | 2 |
| 2007 | 1 |
| 2009 | 2 |
| 2010 | 1 |
| 2011 | 5 |
| 2012 | 5 |
| 2013 | 7 |
| 2014 | 7 |
| 2015 | 7 |
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 6 |
| 2019 | 10 |
| 2020 | 8 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 10 |
| 2024 | 4 |