Year	sq. km
1961	1088400
1962	1089400
1963	1090400
1964	1091420
1965	1092420
1966	1093400
1967	1094500
1968	1095470
1969	1096470
1970	1097450
1971	1098430
1972	1099410
1973	1100480
1974	1101050
1975	1102050
1976	1103000
1977	1103980
1978	1104360
1979	1104350
1980	1104500
1981	1104800
1982	1105400
1983	1105900
1984	1106450
1985	1127000
1986	1157500
1987	1178050
1988	1208450
1989	1228600
1990	1229100
1991	1229650
1992	1240150
1993	1267330
1994	1281150
1995	1296440
1996	1305390
1997	1308320
1998	1311020
1999	1313520
2000	1315750
2001	1320930
2002	1326140
2003	1345300
2004	1344970
2005	1352200
2006	1360530
2007	1366150
2008	1366980
2009	1372658
2010	1372462
2011	1372462
2012	1114659.6
2013	1114533.6
2014	1114449.6
2015	1117498.8
2016	1120548
2017	1123597.2
2018	1126646.4
2019	1126646.4
2020	1126648.4
2021	1126648.4