Year	sq. km
1990	9572911.179
1991	9578366.325
1992	9827862.768999998
1993	9860421.375
1994	9866670.038999999
1995	9872918.705
1996	9879167.371
1997	9885416.034999998
1998	9891664.701
1999	9897913.364999998
2000	9911702.031000001
2001	9919212.5
2002	9926722.970999999
2003	9934233.441000002
2004	9941743.912
2005	9949254.382
2006	9956764.851999998
2007	9964275.322999999
2008	9971785.792999998
2009	9979296.264
2010	9986806.734000001
2011	9999287.936
2012	10011769.138
2013	10024250.34
2014	10036731.542000001
2015	10049212.744
2016	10061358.057
2017	10059915.984000001
2018	10061410.6
2019	10063077.2
2020	10064890.899999999
2021	10066606.533999998