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 |
|---|---|
| 1927 | 1 |
| 1932 | 1 |
| 1934 | 1 |
| 1936 | 3 |
| 1940 | 1 |
| 1946 | 3 |
| 1947 | 1 |
| 1948 | 2 |
| 1949 | 2 |
| 1950 | 1 |
| 1951 | 1 |
| 1952 | 2 |
| 1954 | 4 |
| 1955 | 3 |
| 1956 | 1 |
| 1957 | 3 |
| 1958 | 8 |
| 1959 | 17 |
| 1960 | 5 |
| 1961 | 4 |
| 1962 | 13 |
| 1963 | 13 |
| 1964 | 17 |
| 1965 | 11 |
| 1966 | 5 |
| 1967 | 12 |
| 1968 | 6 |
| 1969 | 12 |
| 1970 | 13 |
| 1971 | 21 |
| 1972 | 12 |
| 1973 | 22 |
| 1974 | 15 |
| 1975 | 14 |
| 1976 | 23 |
| 1977 | 29 |
| 1978 | 26 |
| 1979 | 24 |
| 1980 | 33 |
| 1981 | 34 |
| 1982 | 37 |
| 1983 | 44 |
| 1984 | 45 |
| 1985 | 54 |
| 1986 | 65 |
| 1987 | 75 |
| 1988 | 88 |
| 1989 | 99 |
| 1990 | 97 |
| 1991 | 107 |
| 1992 | 150 |
| 1993 | 161 |
| 1994 | 161 |
| 1995 | 162 |
| 1996 | 216 |
| 1997 | 238 |
| 1998 | 240 |
| 1999 | 253 |
| 2000 | 297 |
| 2001 | 348 |
| 2002 | 400 |
| 2003 | 475 |
| 2004 | 543 |
| 2005 | 684 |
| 2006 | 822 |
| 2007 | 879 |
| 2008 | 1003 |
| 2009 | 1124 |
| 2010 | 1283 |
| 2011 | 1513 |
| 2012 | 1651 |
| 2013 | 1888 |
| 2014 | 2033 |
| 2015 | 2180 |
| 2016 | 2395 |
| 2017 | 2540 |
| 2018 | 2822 |
| 2019 | 3144 |
| 2020 | 3435 |
| 2021 | 782 |