Year	hectares
1961	640000
1962	640000
1963	640000
1964	640000
1965	640000
1966	650000
1967	650000
1968	658000
1969	660000
1970	665000
1971	670000
1972	700000
1973	720000
1974	740000
1975	750000
1976	760000
1977	770000
1978	775000
1979	780000
1980	780000
1981	780000
1982	785000
1983	785000
1984	790000
1985	792000
1986	793000
1987	793000
1988	795000
1989	795000
1990	799000
1991	799000
1992	799000
1993	799000
1994	822000
1995	828000
1996	824000
1997	854000
1998	862000
1999	877000
2000	920000
2001	970000
2002	1015000
2003	1060000
2004	1105000
2005	1150000
2006	1200000
2007	1240000
2008	1290000
2009	1360000
2010	1400000
2011	1428000
2012	1463050
2013	1498100
2014	1502400
2015	1506700
2016	1511000
2017	1439200
2018	1367400
2019	1295600
2020	1224000
2021	1224000