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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1968 | 1 |
| 1969 | 1 |
| 1970 | 1 |
| 1977 | 1 |
| 1978 | 1 |
| 1980 | 1 |
| 1981 | 2 |
| 1983 | 2 |
| 1985 | 1 |
| 1986 | 1 |
| 1988 | 3 |
| 1989 | 2 |
| 1990 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 2 |
| 1998 | 2 |
| 1999 | 2 |
| 2000 | 4 |
| 2015 | 1 |
| 2016 | 1 |
| 2024 | 3 |
| 2025 | 6 |