Year	hectares
1961	7000
1962	7100
1963	9600
1964	9650
1965	9800
1966	11000
1967	11000
1968	11500
1969	10500
1970	9000
1971	10500
1972	13084
1973	18000
1974	26099
1975	31883
1976	32180
1977	31900
1978	29500
1979	29000
1980	13855
1981	13700
1982	13100
1983	16600
1984	21200
1985	20900
1986	25885
1987	25890
1988	25946
1989	25979
1990	9633
1991	9800
1992	10078
1993	13400
1994	13616
1995	15149
1996	15652
1997	15990
1998	16987
1999	12951
2000	12956
2001	23257
2002	24878
2003	28420
2004	28339
2005	28666
2006	27900
2007	27906
2008	29750
2009	30200
2010	31585
2011	31811
2012	32784
2013	33843
2014	32099
2015	33139
2016	34173
2017	34720
2018	34349
2019	35086
2020	34100
2021	33917
2022	33971