Year	sq. km
1990	1295357.31
1991	1301709.3590000002
1992	1412192.387
1993	1464139.8260000001
1994	1470754.664
1995	1477369.503
1996	1483984.3419999997
1997	1490599.1800000002
1998	1497214.019
1999	1503828.8569999998
2000	1517983.696
2001	1522798.639
2002	1527613.583
2003	1532428.526
2004	1537243.47
2005	1542058.413
2006	1546873.3560000001
2007	1551688.3
2008	1556503.243
2009	1561318.1870000002
2010	1566133.1300000004
2011	1569420.23
2012	1572707.33
2013	1575994.4300000002
2014	1579281.53
2015	1582568.6300000001
2016	1584695.3020000001
2017	1586843.084
2018	1588671.0999999999
2019	1590497.4999999998
2020	1592313.7999999998
2021	1594136.8340000003