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Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1790 | 1 |
| 1812 | 1 |
| 1832 | 1 |
| 1835 | 1 |
| 1837 | 1 |
| 1838 | 16 |
| 1839 | 22 |
| 1840 | 85 |
| 1841 | 98 |
| 1842 | 85 |
| 1843 | 73 |
| 1844 | 90 |
| 1845 | 124 |
| 1846 | 88 |
| 1847 | 116 |
| 1848 | 133 |
| 1849 | 151 |
| 1850 | 171 |
| 1851 | 119 |
| 1852 | 149 |
| 1853 | 130 |
| 1854 | 133 |
| 1855 | 140 |
| 1856 | 117 |
| 1857 | 92 |
| 1858 | 127 |
| 1859 | 140 |
| 1860 | 175 |
| 1861 | 151 |
| 1862 | 80 |
| 1863 | 68 |
| 1864 | 59 |
| 1865 | 51 |
| 1866 | 142 |
| 1867 | 200 |
| 1868 | 167 |
| 1869 | 180 |
| 1870 | 140 |
| 1871 | 197 |
| 1872 | 217 |
| 1873 | 226 |
| 1874 | 184 |
| 1875 | 143 |
| 1876 | 121 |
| 1877 | 199 |
| 1878 | 179 |
| 1879 | 137 |
| 1880 | 149 |
| 1881 | 290 |
| 1882 | 249 |
| 1883 | 276 |
| 1884 | 261 |
| 1885 | 264 |
| 1886 | 265 |
| 1887 | 266 |
| 1888 | 247 |
| 1889 | 270 |
| 1890 | 191 |
| 1891 | 213 |
| 1892 | 251 |
| 1893 | 226 |
| 1894 | 216 |
| 1895 | 221 |
| 1896 | 273 |
| 1897 | 273 |
| 1898 | 266 |
| 1899 | 273 |
| 1900 | 267 |
| 1901 | 199 |
| 1902 | 180 |
| 1903 | 226 |
| 1904 | 193 |
| 1905 | 178 |
| 1906 | 129 |
| 1907 | 122 |
| 1908 | 115 |
| 1909 | 92 |
| 1910 | 99 |
| 1911 | 149 |
| 1912 | 173 |
| 1913 | 232 |
| 1914 | 216 |
| 1915 | 184 |
| 1916 | 169 |
| 1917 | 129 |
| 1918 | 158 |
| 1919 | 115 |
| 1920 | 49 |
| 1921 | 61 |
| 1922 | 56 |
| 1923 | 49 |
| 1924 | 35 |
| 1925 | 34 |
| 1926 | 26 |
| 1927 | 44 |
| 1928 | 33 |
| 1929 | 30 |
| 1930 | 26 |
| 1931 | 32 |
| 1932 | 37 |
| 1933 | 27 |
| 1934 | 27 |
| 1935 | 40 |
| 1936 | 26 |
| 1937 | 27 |
| 1938 | 32 |
| 1939 | 23 |
| 1940 | 25 |
| 1941 | 31 |
| 1942 | 30 |
| 1943 | 22 |
| 1944 | 34 |
| 1945 | 27 |
| 1946 | 27 |
| 1947 | 32 |
| 1948 | 25 |
| 1949 | 28 |
| 1950 | 20 |
| 1951 | 25 |
| 1952 | 29 |
| 1953 | 27 |
| 1954 | 33 |
| 1955 | 30 |
| 1956 | 20 |
| 1957 | 17 |
| 1958 | 19 |
| 1959 | 15 |
| 1960 | 18 |
| 1961 | 15 |
| 1962 | 16 |
| 1963 | 21 |
| 1964 | 34 |
| 1965 | 33 |
| 1966 | 103 |
| 1967 | 152 |
| 1968 | 142 |
| 1969 | 363 |
| 1970 | 480 |
| 1971 | 268 |
| 1972 | 166 |
| 1973 | 1355 |
| 1974 | 3185 |
| 1975 | 3363 |
| 1976 | 3378 |
| 1977 | 3242 |
| 1978 | 3425 |
| 1979 | 3427 |
| 1980 | 2676 |
| 1981 | 2256 |
| 1982 | 1964 |
| 1983 | 2276 |
| 1984 | 2332 |
| 1985 | 2464 |
| 1986 | 2911 |
| 1987 | 3342 |
| 1988 | 3435 |
| 1989 | 3903 |
| 1990 | 5043 |
| 1991 | 6724 |
| 1992 | 7132 |
| 1993 | 7532 |
| 1994 | 7797 |
| 1995 | 8218 |
| 1996 | 8656 |
| 1997 | 8934 |
| 1998 | 9382 |
| 1999 | 10165 |
| 2000 | 10970 |
| 2001 | 11489 |
| 2002 | 12220 |
| 2003 | 13225 |
| 2004 | 13863 |
| 2005 | 15079 |
| 2006 | 15744 |
| 2007 | 16466 |
| 2008 | 20365 |
| 2009 | 21194 |
| 2010 | 21936 |
| 2011 | 23111 |
| 2012 | 24829 |
| 2013 | 26498 |
| 2014 | 28083 |
| 2015 | 29961 |
| 2016 | 31565 |
| 2017 | 34107 |
| 2018 | 35192 |
| 2019 | 37292 |
| 2020 | 46370 |
| 2021 | 46503 |
| 2022 | 47830 |
| 2023 | 52467 |
| 2024 | 55933 |
| 2025 | 56829 |
| 2026 | 19714 |
| 2027 | 2 |