Year	hectares
1961	100000
1962	100000
1963	100000
1964	100000
1965	100000
1966	100000
1967	100000
1968	100000
1969	100000
1970	110000
1971	110000
1972	110000
1973	110000
1974	115000
1975	115000
1976	120000
1977	120000
1978	120000
1979	125000
1980	130000
1981	130000
1982	135000
1983	145000
1984	145000
1985	145000
1986	145000
1987	146000
1988	141000
1989	133000
1990	135000
1991	135000
1992	135000
1993	136000
1994	140000
1995	146000
1996	151000
1997	153000
1998	153000
1999	153000
2000	154000
2001	155000
2002	156000
2003	157000
2004	158000
2005	167000
2006	151300
2007	136300
2008	100000
2009	100000
2010	100600
2011	100200
2012	100200
2013	100200
2014	100200
2015	100200
2016	100000
2017	94500
2018	94000
2019	94000
2020	94000
2021	94000