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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1955 | 1 |
| 1956 | 1 |
| 1959 | 2 |
| 1967 | 1 |
| 1968 | 1 |
| 1969 | 1 |
| 1970 | 1 |
| 1971 | 1 |
| 1983 | 1 |
| 1986 | 1 |
| 1988 | 1 |
| 1989 | 1 |
| 1990 | 1 |
| 1993 | 1 |
| 1995 | 2 |
| 1997 | 1 |
| 1998 | 2 |
| 1999 | 1 |
| 2000 | 1 |
| 2007 | 1 |
| 2009 | 2 |
| 2011 | 1 |
| 2012 | 1 |
| 2013 | 5 |
| 2014 | 5 |
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 15 |
| 2021 | 10 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 27 |