Year	Hectares
1990	17644900
1991	17533010
1992	17421120
1993	17309230
1994	17197340
1995	17085450
1996	16973550
1997	16861660
1998	16749770
1999	16637880
2000	16525990
2001	16594730
2002	16663480
2003	16732220
2004	16800970
2005	16869710
2006	17058880
2007	17248050
2008	17437220
2009	17626390
2010	17815560
2011	18004730
2012	18193900
2013	18383070
2014	18572240
2015	18761410