Year sq. km 1961 45784979.9 1962 45784979.9 1963 45784979.9 1964 45784979.9 1965 45784979.9 1966 45784979.9 1967 45784979.9 1968 45784979.9 1969 45784979.9 1970 45784979.9 1971 45784979.9 1972 45784979.9 1973 45784979.9 1974 45784979.9 1975 45784979.9 1976 45784979.9 1977 45782859.9 1978 45782859.9 1979 45784899.9 1980 45784979.9 1981 45784979.9 1982 45784979.9 1983 45784979.9 1984 45784979.9 1985 45784979.9 1986 45784979.9 1987 45783639.9 1988 45783649.9 1989 45783649.9 1990 45784319.9 1991 45784349.9 1992 45784379.9 1993 45784479.9 1994 45784479.9 1995 45784479.9 1996 45784469.9 1997 45784459.9 1998 45784459.9 1999 45784459.9 2000 45782050.9 2001 45782055.099999994 2002 45782104.099999994 2003 45782113.6 2004 45782127.4 2005 45784024.7 2006 45784014.3 2007 45784013.7 2008 45783857.7 2009 45783861.9 2010 45783771.9 2011 45783740.9 2012 45783732.9 2013 45783458.9 2014 45783603.9 2015 45783552.9 2016 45784524.9 2017 45784428.9 2018 45784351.9 2019 45784137.9 2020 45779681.699 2021 45779851.95