Year	sq. km
1990	507946.16899999994
1991	505486.72199999995
1992	503027.27499999997
1993	500567.828
1994	498108.381
1995	495648.935
1996	493189.48799999995
1997	490730.04099999997
1998	488270.59400000004
1999	485811.14699999994
2000	483351.69999999995
2001	481389.93
2002	479428.16
2003	477466.39
2004	475504.62000000005
2005	473542.8500000001
2006	471581.07999999996
2007	469619.31
2008	467657.54000000004
2009	465695.76999999996
2010	463734
2011	461308.8399999999
2012	387313.68
2013	384888.52
2014	382463.36
2015	380038.19999999995
2016	377730.6
2017	375191.7
2018	372634.1
2019	370302.69999999995
2020	367980.69999999995
2021	365652.43299999996