Year	sq. km
1992	31291813.354
1993	31209434.207999997
1994	31127055.062000003
1995	31044675.918
1996	30962296.773999996
1997	30879917.62800001
1998	30797538.481999986
1999	30715159.337000005
2000	30632780.191999998
2001	30574087.65500001
2002	30515395.115999993
2003	30456702.578999996
2004	30398010.041
2005	30339317.504
2006	30314208.965999994
2007	30255970.42799998
2008	30197731.890999984
2009	30139493.350999992
2010	30081254.813999996
2011	30023425.635
2012	29965596.453999996
2013	29907767.273999985
2014	29849938.096
2015	29792108.916
2016	29748797.400999997
2017	29681756.174999986
2018	29631756.741999995
2019	29578873.200000003
2020	29527272.200000007
2021	29474816.170999996