Middle income

Surface area (sq km)

Year	Value
2021	81,075,664.13
2020	81,075,471.879
2019	81,079,934.08
2018	80,981,946.2
2017	80,982,401
2016	80,978,910
2015	80,978,542
2014	80,971,118
2013	80,972,856
2012	80,973,438
2011	80,973,446
2010	80,973,476
2009	80,973,571
2008	80,976,111.8
2007	80,976,272.8
2006	80,976,273.4
2005	80,976,273.8
2004	80,974,376.5
2003	80,976,035.7
2002	80,976,026.2
2001	80,975,977.2
2000	80,975,973
1999	80,981,150
1998	80,981,150
1997	81,008,340
1996	81,008,350
1995	81,008,360
1994	81,008,360
1993	81,015,283
1992	81,015,193
1991	81,015,163
1990	81,015,133
1989	81,014,463
1988	81,014,463
1987	81,014,453
1986	81,015,793
1985	81,015,793
1984	81,015,793
1983	81,015,793
1982	81,015,793
1981	81,015,793
1980	81,015,793
1979	81,015,713
1978	81,013,673
1977	81,013,673
1976	81,015,793
1975	81,015,793
1974	81,015,793
1973	81,015,793
1972	81,015,793
1971	81,015,793
1970	81,015,793
1969	81,015,793
1968	81,015,793
1967	81,015,793
1966	81,015,793
1965	81,015,793
1964	81,015,793
1963	81,015,793
1962	81,015,793
1961	81,015,793