Year	sq. km
1990	121320
1991	121301
1992	121282
1993	121263
1994	121244
1995	121225
1996	121206
1997	121187
1998	121168
1999	121149
2000	121130
2001	121119
2002	121108
2003	121097
2004	121086
2005	121075
2006	121064
2007	121053
2008	121042
2009	121031
2010	121020
2011	121098
2012	121176
2013	121254
2014	121332
2015	121410
2016	121488
2017	121566
2018	121644
2019	121722
2020	121800
2021	121878