Year	hectares
1961	2150000
1962	2150000
1963	2150000
1964	2150000
1965	2150000
1966	2150000
1967	2150000
1968	2150000
1969	2150000
1970	2150000
1971	2150000
1972	2150000
1973	2200000
1974	2200000
1975	2200000
1976	2200000
1977	2200000
1978	2200000
1979	2200000
1980	2285000
1981	2285000
1982	2285000
1983	2285000
1984	2285000
1985	2285000
1986	2285000
1987	2285000
1988	2285000
1989	2285000
1990	2288000
1991	2300000
1992	2300000
1993	2300000
1994	2400000
1995	2400000
1996	2300000
1997	2300000
1998	2300000
1999	2300000
2000	2300000
2001	2300000
2002	2300000
2003	2300000
2004	2300000
2005	2350000
2006	2350000
2007	2350000
2008	2400000
2009	2400000
2010	2400000
2011	2350000
2012	2350000
2013	2350000
2014	2335000
2015	2320000
2016	2310000
2017	2295000
2018	2295000
2019	2295000
2020	2295000
2021	2295000