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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1969 | 1 |
| 1973 | 1 |
| 1974 | 1 |
| 1975 | 4 |
| 1976 | 4 |
| 1977 | 11 |
| 1978 | 10 |
| 1979 | 22 |
| 1980 | 12 |
| 1981 | 9 |
| 1982 | 4 |
| 1983 | 5 |
| 1984 | 2 |
| 1985 | 9 |
| 1986 | 1 |
| 1987 | 5 |
| 1989 | 1 |
| 1991 | 1 |
| 1994 | 1 |
| 1997 | 1 |
| 1999 | 1 |
| 2001 | 1 |
| 2004 | 1 |
| 2009 | 1 |
| 2010 | 2 |
| 2011 | 2 |
| 2013 | 1 |
| 2014 | 1 |
| 2018 | 1 |
| 2025 | 1 |