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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1960 | 1 |
| 1962 | 1 |
| 1965 | 3 |
| 1966 | 2 |
| 1967 | 1 |
| 1970 | 1 |
| 1971 | 4 |
| 1972 | 1 |
| 1973 | 1 |
| 1974 | 2 |
| 1975 | 2 |
| 1976 | 1 |
| 1978 | 1 |
| 1979 | 3 |
| 1980 | 4 |
| 1982 | 1 |
| 1985 | 1 |
| 1986 | 1 |
| 1987 | 5 |
| 1988 | 2 |
| 1989 | 2 |
| 1990 | 2 |
| 1991 | 4 |
| 1992 | 1 |
| 1993 | 2 |
| 1996 | 1 |
| 1998 | 2 |
| 2000 | 1 |
| 2002 | 1 |
| 2003 | 1 |
| 2006 | 1 |
| 2009 | 2 |
| 2010 | 1 |
| 2011 | 2 |
| 2015 | 1 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 1 |
| 2024 | 1 |
| 2025 | 2 |