THE YEARS FOR WHICH DATA HAS BEEN ENTERED
Year	Entered	Year	Entered	Year	Entered	Year	Entered
1940		1960		1980	Unavailable	2000	YES
1941		1961		1981	Unavailable	2001	YES
1942		1962		1982	Unavailable	2002	YES
1943		1963		1983	YES	2003	YES
1944		1964		1984	YES	2004	YES
1945		1965		1985	YES	2005	YES
1946		1966		1986	YES	2006
1947		1967		1987	YES	2007
1948		1968		1988	YES	2008
1949		1969		1989	YES	2009
1950		1970	YES	1990	YES	2010
1951		1971	YES	1991	YES	2011
1952		1972	YES	1992	YES	2012
1953		1973	YES	1993	YES	2013
1954		1974	YES	1994	YES	2014
1955		1975	YES	1995	YES	2015
1956		1976	YES	1996	YES	2016
1957		1977	YES	1997	YES	2017
1958		1978	Unavailable	1998	YES	2018
1959		1979	Unavailable	1999	YES	2019