Year	hectares
1961	2836
1962	2831
1963	2821
1964	2600
1965	2510
1966	2448
1967	3480
1968	3480
1969	3650
1970	3456
1971	2734
1972	2473
1973	2522
1974	3363
1975	3636
1976	3680
1977	2833
1978	2410
1979	2121
1980	1991
1981	1828
1982	1596
1983	1694
1984	2100
1985	873
1986	721
1987	1016
1988	890
1989	700
1990	600
1991	1600
1992	1400
1993	1500
1994	1500
1995	1000
1996	900
1997	900
1998	900
1999	380
2000	460
2001	539
2002	572
2003	841
2004	954
2005	1310
2006	1377
2007	1510
2008	1400
2009	1370
2010	1600
2011	1500
2012	1600
2013	1300
2014	1300
2015	1300
2016	1400
2017	1300
2018	1200
2019	1100
2020	1300
2021	1500
2022	1500