Year	hectares
1961	5850
1962	5980
1963	5740
1964	5894
1965	5876
1966	5850
1967	5850
1968	5850
1969	5630
1970	5865
1971	5900
1972	4500
1973	5150
1974	5600
1975	5550
1976	5650
1977	6000
1978	6580
1979	6800
1980	7100
1981	7200
1982	7600
1983	8400
1984	8839
1985	9290
1986	14290
1987	15100
1988	15740
1989	14180
1990	14900
1991	14503
1992	16368
1993	17199
1994	18395
1995	18907
1996	18423
1997	15935
1998	17130
1999	17360
2000	16500
2001	16976
2002	17280
2003	20853
2004	20089
2005	22492
2006	20994
2007	20454
2008	22519
2009	25035
2010	25552
2011	26568
2012	27120
2013	27620
2014	28120
2015	28532
2016	28928
2017	29243
2018	29731
2019	29314
2020	29424
2021	29486
2022	29410