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 |
|---|---|
| 1786 | 1 |
| 1788 | 1 |
| 1802 | 1 |
| 1803 | 1 |
| 1805 | 3 |
| 1807 | 2 |
| 1808 | 3 |
| 1814 | 1 |
| 1827 | 1 |
| 1841 | 1 |
| 1856 | 1 |
| 1858 | 1 |
| 1863 | 1 |
| 1865 | 1 |
| 1867 | 1 |
| 1868 | 1 |
| 1880 | 2 |
| 1897 | 1 |
| 1899 | 3 |
| 1903 | 1 |
| 1904 | 2 |
| 1905 | 2 |
| 1906 | 2 |
| 1907 | 1 |
| 1909 | 2 |
| 1910 | 1 |
| 1912 | 1 |
| 1913 | 1 |
| 1914 | 1 |
| 1915 | 2 |
| 1916 | 1 |
| 1917 | 5 |
| 1918 | 3 |
| 1921 | 1 |
| 1922 | 2 |
| 1923 | 1 |
| 1925 | 1 |
| 1926 | 1 |
| 1928 | 2 |
| 1929 | 1 |
| 1930 | 3 |
| 1931 | 1 |
| 1934 | 1 |
| 1935 | 1 |
| 1937 | 2 |
| 1938 | 2 |
| 1939 | 2 |
| 1940 | 2 |
| 1941 | 2 |
| 1942 | 6 |
| 1943 | 3 |
| 1945 | 9 |
| 1946 | 17 |
| 1947 | 15 |
| 1948 | 19 |
| 1949 | 24 |
| 1950 | 33 |
| 1951 | 27 |
| 1952 | 24 |
| 1953 | 30 |
| 1954 | 20 |
| 1955 | 21 |
| 1956 | 26 |
| 1957 | 28 |
| 1958 | 28 |
| 1959 | 16 |
| 1960 | 20 |
| 1961 | 19 |
| 1962 | 21 |
| 1963 | 28 |
| 1964 | 31 |
| 1965 | 40 |
| 1966 | 42 |
| 1967 | 29 |
| 1968 | 31 |
| 1969 | 29 |
| 1970 | 44 |
| 1971 | 53 |
| 1972 | 44 |
| 1973 | 44 |
| 1974 | 59 |
| 1975 | 57 |
| 1976 | 78 |
| 1977 | 91 |
| 1978 | 109 |
| 1979 | 105 |
| 1980 | 80 |
| 1981 | 91 |
| 1982 | 82 |
| 1983 | 102 |
| 1984 | 104 |
| 1985 | 94 |
| 1986 | 107 |
| 1987 | 117 |
| 1988 | 120 |
| 1989 | 162 |
| 1990 | 145 |
| 1991 | 142 |
| 1992 | 167 |
| 1993 | 151 |
| 1994 | 179 |
| 1995 | 359 |
| 1996 | 407 |
| 1997 | 447 |
| 1998 | 525 |
| 1999 | 436 |
| 2000 | 485 |
| 2001 | 502 |
| 2002 | 569 |
| 2003 | 560 |
| 2004 | 582 |
| 2005 | 668 |
| 2006 | 711 |
| 2007 | 737 |
| 2008 | 757 |
| 2009 | 753 |
| 2010 | 779 |
| 2011 | 855 |
| 2012 | 888 |
| 2013 | 929 |
| 2014 | 1172 |
| 2015 | 1355 |
| 2016 | 1446 |
| 2017 | 1445 |
| 2018 | 1551 |
| 2019 | 1482 |
| 2020 | 1734 |
| 2021 | 450 |