Year	hectares
1961	4901000
1962	4880000
1963	4860000
1964	4840000
1965	4820000
1966	4800000
1967	4760000
1968	4730000
1969	4700000
1970	4670000
1971	4644000
1972	4700000
1973	4750000
1974	4800000
1975	4850000
1976	5000000
1977	5100000
1978	5150000
1979	5200000
1980	5228000
1981	5220000
1982	5240000
1983	5260000
1984	5280000
1985	5350000
1986	5400000
1987	5420000
1988	5440000
1989	5460000
1990	5480000
1991	5487000
1992	5435000
1993	5385000
1994	5335000
1995	5285000
1996	5235000
1997	5185000
1998	5135000
1999	5085000
2000	5034000
2001	4984000
2002	4935000
2003	4970000
2004	5120000
2005	5005000
2006	5155000
2007	5290000
2008	5450000
2009	5500000
2010	5300000
2011	5450000
2012	5580000
2013	5590000
2014	5590000
2015	5590000
2016	5590000
2017	5590000
2018	5590000
2019	5590000
2020	5590000
2021	5590000