Year	hectares
1961	1680000
1962	1680000
1963	1680000
1964	1680000
1965	1680000
1966	1680000
1967	1700000
1968	1700000
1969	1700000
1970	1700000
1971	1700000
1972	1710000
1973	1740000
1974	1775000
1975	1815000
1976	1840000
1977	1880000
1978	1910000
1979	1925000
1980	1955000
1981	1970000
1982	1990000
1983	2034000
1984	2301000
1985	2380000
1986	2380000
1987	2400000
1988	2420000
1989	2420000
1990	2430000
1991	2450000
1992	2600000
1993	2902000
1994	3000000
1995	3000000
1996	3000000
1997	2900000
1998	2900000
1999	2800000
2000	2800000
2001	2800000
2002	2800000
2003	2800000
2004	2800000
2005	2800000
2006	2800000
2007	2900000
2008	2900000
2009	2900000
2010	2900000
2011	2900000
2012	3000000
2013	3500000
2014	3500000
2015	3500000
2016	3500000
2017	3500000
2018	3500000
2019	3500000
2020	3500000
2021	3500000