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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1949 | 1 |
| 1951 | 3 |
| 1959 | 1 |
| 1961 | 1 |
| 1966 | 1 |
| 1967 | 1 |
| 1970 | 1 |
| 1971 | 1 |
| 1972 | 1 |
| 1973 | 3 |
| 1974 | 2 |
| 1975 | 1 |
| 1976 | 1 |
| 1978 | 2 |
| 1979 | 1 |
| 1980 | 1 |
| 1981 | 2 |
| 1986 | 2 |
| 1987 | 2 |
| 1989 | 1 |
| 1990 | 1 |
| 1991 | 2 |
| 1992 | 1 |
| 1994 | 1 |
| 1995 | 1 |
| 2000 | 2 |
| 2005 | 3 |
| 2012 | 1 |
| 2013 | 2 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 3 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 1 |
| 2024 | 1 |