Year	sq. km
1990	88820
1991	88997
1992	89174
1993	89351
1994	89528
1995	89705
1996	89882
1997	90059
1998	90236
1999	90413
2000	90590
2001	90860
2002	91130
2003	91400
2004	91670
2005	91940
2006	92210
2007	92480
2008	92750
2009	93020
2010	93290
2011	93472
2012	93654
2013	93836
2014	94018
2015	94200
2016	94350
2017	94470
2018	94590
2019	94710
2020	94830
2021	94950