United States

Surface area (sq km)

Year	Value
2021	9,831,510
2020	9,831,510
2019	9,831,510
2018	9,831,510
2017	9,831,510
2016	9,831,510
2015	9,831,510
2014	9,831,510
2013	9,831,510
2012	9,831,510
2011	9,831,510
2010	9,831,510
2009	9,831,510
2008	9,831,510
2007	9,632,030
2006	9,632,030
2005	9,632,030
2004	9,632,030
2003	9,632,030
2002	9,632,030
2001	9,632,030
2000	9,632,030
1999	9,629,090
1998	9,629,090
1997	9,629,090
1996	9,629,090
1995	9,629,090
1994	9,629,090
1993	9,629,090
1992	9,629,090
1991	9,629,090
1990	9,629,090
1989	9,629,090
1988	9,629,090
1987	9,629,090
1986	9,629,090
1985	9,629,090
1984	9,629,090
1983	9,629,090
1982	9,629,090
1981	9,629,090
1980	9,629,090
1979	9,629,090
1978	9,629,090
1977	9,629,090
1976	9,629,090
1975	9,629,090
1974	9,629,090
1973	9,629,090
1972	9,629,090
1971	9,629,090
1970	9,629,090
1969	9,629,090
1968	9,629,090
1967	9,629,090
1966	9,629,090
1965	9,629,090
1964	9,629,090
1963	9,629,090
1962	9,629,090
1961	9,629,090