COVID-19 is an emerging, rapidly evolving situation.
Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
|---|---|
| 1787 | 1 |
| 1799 | 1 |
| 1805 | 1 |
| 1807 | 1 |
| 1808 | 3 |
| 1813 | 1 |
| 1818 | 1 |
| 1826 | 1 |
| 1827 | 1 |
| 1829 | 1 |
| 1840 | 1 |
| 1842 | 1 |
| 1843 | 2 |
| 1844 | 2 |
| 1850 | 1 |
| 1852 | 3 |
| 1855 | 1 |
| 1857 | 1 |
| 1858 | 6 |
| 1860 | 1 |
| 1863 | 2 |
| 1868 | 1 |
| 1869 | 1 |
| 1871 | 1 |
| 1873 | 2 |
| 1875 | 2 |
| 1877 | 2 |
| 1878 | 7 |
| 1879 | 1 |
| 1880 | 1 |
| 1881 | 2 |
| 1883 | 6 |
| 1884 | 2 |
| 1885 | 3 |
| 1886 | 7 |
| 1887 | 4 |
| 1888 | 10 |
| 1889 | 2 |
| 1890 | 1 |
| 1891 | 3 |
| 1892 | 5 |
| 1893 | 4 |
| 1894 | 2 |
| 1895 | 1 |
| 1896 | 7 |
| 1898 | 11 |
| 1900 | 1 |
| 1901 | 3 |
| 1902 | 3 |
| 1903 | 1 |
| 1904 | 3 |
| 1905 | 5 |
| 1906 | 5 |
| 1907 | 2 |
| 1908 | 4 |
| 1909 | 3 |
| 1910 | 2 |
| 1911 | 4 |
| 1912 | 6 |
| 1913 | 11 |
| 1914 | 2 |
| 1915 | 4 |
| 1916 | 9 |
| 1917 | 11 |
| 1918 | 5 |
| 1919 | 3 |
| 1920 | 12 |
| 1921 | 2 |
| 1922 | 11 |
| 1923 | 4 |
| 1924 | 7 |
| 1925 | 12 |
| 1926 | 8 |
| 1927 | 9 |
| 1928 | 14 |
| 1929 | 8 |
| 1930 | 14 |
| 1931 | 12 |
| 1932 | 14 |
| 1933 | 8 |
| 1934 | 10 |
| 1935 | 13 |
| 1936 | 13 |
| 1937 | 13 |
| 1938 | 10 |
| 1939 | 17 |
| 1940 | 15 |
| 1941 | 19 |
| 1942 | 11 |
| 1943 | 14 |
| 1944 | 13 |
| 1945 | 46 |
| 1946 | 116 |
| 1947 | 181 |
| 1948 | 161 |
| 1949 | 177 |
| 1950 | 202 |
| 1951 | 266 |
| 1952 | 263 |
| 1953 | 260 |
| 1954 | 280 |
| 1955 | 233 |
| 1956 | 222 |
| 1957 | 247 |
| 1958 | 262 |
| 1959 | 266 |
| 1960 | 256 |
| 1961 | 288 |
| 1962 | 275 |
| 1963 | 271 |
| 1964 | 424 |
| 1965 | 425 |
| 1966 | 418 |
| 1967 | 549 |
| 1968 | 480 |
| 1969 | 617 |
| 1970 | 598 |
| 1971 | 574 |
| 1972 | 617 |
| 1973 | 637 |
| 1974 | 616 |
| 1975 | 737 |
| 1976 | 721 |
| 1977 | 825 |
| 1978 | 817 |
| 1979 | 869 |
| 1980 | 950 |
| 1981 | 994 |
| 1982 | 1086 |
| 1983 | 1150 |
| 1984 | 1127 |
| 1985 | 1221 |
| 1986 | 1335 |
| 1987 | 1504 |
| 1988 | 1728 |
| 1989 | 1811 |
| 1990 | 1990 |
| 1991 | 2003 |
| 1992 | 1976 |
| 1993 | 2010 |
| 1994 | 2046 |
| 1995 | 2175 |
| 1996 | 2299 |
| 1997 | 2495 |
| 1998 | 2642 |
| 1999 | 2773 |
| 2000 | 3406 |
| 2001 | 3562 |
| 2002 | 3691 |
| 2003 | 3909 |
| 2004 | 4371 |
| 2005 | 4975 |
| 2006 | 5511 |
| 2007 | 6037 |
| 2008 | 6423 |
| 2009 | 6768 |
| 2010 | 7196 |
| 2011 | 7789 |
| 2012 | 8567 |
| 2013 | 8946 |
| 2014 | 9849 |
| 2015 | 11106 |
| 2016 | 11607 |
| 2017 | 11839 |
| 2018 | 12351 |
| 2019 | 12715 |
| 2020 | 14330 |
| 2021 | 5648 |