Year	sq. km
1990	34.5
1991	35.9
1992	37.3
1993	38.7
1994	40.1
1995	41.5
1996	42.9
1997	44.3
1998	45.7
1999	47.1
2000	48.5
2001	49.9
2002	51.3
2003	52.7
2004	54.1
2005	55.5
2006	56.9
2007	58.3
2008	59.7
2009	61.1
2010	62.5
2011	62.5
2012	62.5
2013	62.5
2014	62.5
2015	62.5
2016	62.5
2017	62.5
2018	62.5
2019	62.5
2020	62.5
2021	62.5