Year	sq. km
1992	8862916.093999999
1993	8865032.202999998
1994	8867148.311999999
1995	8869264.422
1996	8871380.531
1997	8873496.64
1998	8875612.749
1999	8877728.859
2000	8879844.967999998
2001	8888361.726
2002	8896878.481999999
2003	8905395.24
2004	8913911.996999998
2005	8922428.755
2006	8964529.512
2007	8973500.269000001
2008	8982471.026999999
2009	8991441.782999998
2010	9000412.541
2011	9003715.055
2012	9007017.566999998
2013	9010320.08
2014	9013622.594000002
2015	9016925.106999999
2016	9021233.754
2017	9025717.258999998
2018	9028614.062
2019	9031512.6
2020	9034413.299999997
2021	9037312.559