Year	hectares
1961	8129
1962	5419
1963	5550
1964	7291
1965	7842
1966	8128
1967	8102
1968	8410
1969	8785
1970	11892
1971	13357
1972	14424
1973	13042
1974	15475
1975	15782
1976	16857
1977	16106
1978	13961
1979	12909
1980	13800
1981	15432
1982	14342
1983	12718
1984	14305
1985	16630
1986	13056
1987	16300
1988	17000
1989	17720
1990	14815
1991	16903
1992	16653
1993	19970
1994	18104
1995	22560
1996	22335
1997	25007
1998	21247
1999	22207
2000	19797
2001	18473
2002	23042
2003	21052
2004	22800
2005	25007
2006	19979
2007	23866
2008	24523
2009	32487
2010	30554
2011	29082
2012	26550
2013	30959
2014	26295
2015	27938
2016	28932
2017	27991
2018	24567
2019	28886
2020	31763
2021	31848
2022	32777