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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1932 | 1 |
| 1934 | 1 |
| 1940 | 1 |
| 1947 | 1 |
| 1948 | 1 |
| 1949 | 1 |
| 1950 | 8 |
| 1951 | 14 |
| 1952 | 9 |
| 1953 | 10 |
| 1954 | 9 |
| 1955 | 11 |
| 1956 | 7 |
| 1957 | 9 |
| 1958 | 5 |
| 1959 | 5 |
| 1961 | 3 |
| 1962 | 1 |
| 1963 | 3 |
| 1964 | 2 |
| 1965 | 1 |
| 1966 | 1 |
| 1967 | 5 |
| 1968 | 3 |
| 1969 | 9 |
| 1970 | 8 |
| 1971 | 2 |
| 1972 | 2 |
| 1973 | 1 |
| 1975 | 1 |
| 1976 | 3 |
| 1978 | 1 |
| 1979 | 1 |
| 1980 | 1 |
| 1981 | 1 |
| 1982 | 1 |
| 1983 | 2 |
| 1989 | 1 |
| 1991 | 2 |
| 1992 | 1 |
| 1994 | 1 |
| 1998 | 1 |
| 1999 | 1 |
| 2004 | 2 |
| 2005 | 2 |
| 2016 | 4 |
| 2017 | 2 |
| 2019 | 1 |
| 2020 | 5 |
| 2023 | 2 |