Year	Hectares
1990	21157000
1991	20978100
1992	20799200
1993	20620300
1994	20441400
1995	20262500
1996	20083600
1997	19904700
1998	19725800
1999	19546900
2000	19368000
2001	19189400
2002	19010800
2003	18832200
2004	18653600
2005	18475000
2006	18170000
2007	17865000
2008	17560000
2009	17255000
2010	16950000
2011	16624600
2012	16299200
2013	15973800
2014	15648400
2015	15323000