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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1927 | 1 |
| 1951 | 1 |
| 1952 | 4 |
| 1955 | 3 |
| 1956 | 1 |
| 1957 | 2 |
| 1959 | 3 |
| 1960 | 3 |
| 1961 | 2 |
| 1966 | 2 |
| 1967 | 4 |
| 1968 | 11 |
| 1969 | 28 |
| 1970 | 14 |
| 1971 | 1 |
| 1974 | 1 |
| 1976 | 1 |
| 1987 | 1 |
| 1988 | 2 |
| 2001 | 1 |
| 2003 | 2 |
| 2004 | 1 |
| 2006 | 1 |
| 2007 | 2 |
| 2008 | 2 |
| 2009 | 3 |
| 2010 | 3 |
| 2012 | 3 |
| 2013 | 1 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2024 | 2 |