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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1917 | 1 |
| 1918 | 1 |
| 1919 | 1 |
| 1928 | 1 |
| 1937 | 1 |
| 1943 | 1 |
| 1946 | 2 |
| 1947 | 2 |
| 1948 | 8 |
| 1949 | 7 |
| 1950 | 3 |
| 1951 | 4 |
| 1952 | 8 |
| 1953 | 9 |
| 1954 | 6 |
| 1955 | 10 |
| 1956 | 14 |
| 1957 | 11 |
| 1958 | 22 |
| 1959 | 26 |
| 1960 | 22 |
| 1961 | 10 |
| 1962 | 22 |
| 1963 | 43 |
| 1964 | 25 |
| 1965 | 22 |
| 1966 | 18 |
| 1967 | 15 |
| 1968 | 15 |
| 1969 | 28 |
| 1970 | 23 |
| 1971 | 25 |
| 1972 | 34 |
| 1973 | 20 |
| 1974 | 37 |
| 1975 | 41 |
| 1976 | 44 |
| 1977 | 31 |
| 1978 | 49 |
| 1979 | 48 |
| 1980 | 62 |
| 1981 | 84 |
| 1982 | 86 |
| 1983 | 100 |
| 1984 | 93 |
| 1985 | 108 |
| 1986 | 140 |
| 1987 | 132 |
| 1988 | 160 |
| 1989 | 151 |
| 1990 | 160 |
| 1991 | 195 |
| 1992 | 214 |
| 1993 | 228 |
| 1994 | 220 |
| 1995 | 262 |
| 1996 | 277 |
| 1997 | 339 |
| 1998 | 350 |
| 1999 | 416 |
| 2000 | 461 |
| 2001 | 484 |
| 2002 | 608 |
| 2003 | 712 |
| 2004 | 893 |
| 2005 | 1075 |
| 2006 | 1308 |
| 2007 | 1506 |
| 2008 | 1830 |
| 2009 | 2130 |
| 2010 | 2552 |
| 2011 | 2950 |
| 2012 | 3496 |
| 2013 | 4040 |
| 2014 | 4714 |
| 2015 | 5226 |
| 2016 | 5574 |
| 2017 | 6025 |
| 2018 | 6819 |
| 2019 | 7793 |
| 2020 | 9184 |
| 2021 | 10326 |
| 2022 | 12108 |
| 2023 | 5542 |