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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1948 | 1 |
| 1949 | 1 |
| 1950 | 3 |
| 1951 | 1 |
| 1952 | 1 |
| 1953 | 5 |
| 1955 | 2 |
| 1956 | 1 |
| 1957 | 3 |
| 1958 | 2 |
| 1959 | 2 |
| 1960 | 5 |
| 1961 | 5 |
| 1962 | 3 |
| 1964 | 5 |
| 1965 | 1 |
| 1966 | 3 |
| 1967 | 5 |
| 1968 | 9 |
| 1969 | 3 |
| 1970 | 4 |
| 1971 | 1 |
| 1972 | 1 |
| 1973 | 4 |
| 1974 | 2 |
| 1975 | 1 |
| 1977 | 1 |
| 1978 | 2 |
| 1979 | 1 |
| 1981 | 2 |
| 1986 | 1 |
| 1987 | 1 |
| 1994 | 3 |
| 1995 | 1 |
| 1998 | 1 |
| 2000 | 2 |
| 2001 | 1 |
| 2004 | 1 |
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 1 |
| 2014 | 1 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2023 | 1 |