Year	sq. km
1992	17692048.725
1993	17693528.956999995
1994	17675986.528
1995	17658444.101000004
1996	17640901.672
1997	17623359.243
1998	17605816.815000005
1999	17588274.387
2000	17570731.958
2001	17562825.717
2002	17554919.473999992
2003	17547013.232999995
2004	17539106.990999997
2005	17531200.75
2006	17556878.508
2007	17549426.266
2008	17541974.024999995
2009	17534521.781999994
2010	17527069.541000005
2011	17535737.695
2012	17544405.847
2013	17553074
2014	17561742.153999995
2015	17570410.306999996
2016	17578118.621999998
2017	17578621.615
2018	17587197.861999996
2019	17593652.8
2020	17600849.8
2021	17607552.091999996