Year	sq. km
2000	6673
2001	6695.57
2002	6718.14
2003	6740.71
2004	6763.28
2005	6785.85
2006	6808.42
2007	6830.99
2008	6853.56
2009	6876.13
2010	6898.7
2011	6897.56
2012	6896.42
2013	6895.28
2014	6894.14
2015	6893
2016	6893
2017	6893
2018	6893
2019	6893
2020	6893
2021	6893