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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1961 | 1 |
| 1962 | 1 |
| 1965 | 1 |
| 1966 | 1 |
| 1967 | 2 |
| 1970 | 4 |
| 1971 | 1 |
| 1972 | 5 |
| 1973 | 2 |
| 1974 | 1 |
| 1975 | 1 |
| 1976 | 4 |
| 1977 | 4 |
| 1981 | 2 |
| 1983 | 1 |
| 1986 | 1 |
| 1987 | 1 |
| 1991 | 1 |
| 1994 | 1 |
| 2008 | 1 |
| 2009 | 1 |
| 2025 | 1 |