Year	hectares
1961	1723824
1962	1975708
1963	1944683
1964	1907398
1965	1625595
1966	1817474
1967	1894358
1968	2054000
1969	1920028
1970	1911633
1971	1927747
1972	1894562
1973	1880046
1974	2000390
1975	2043762
1976	2077889
1977	1899889
1978	2043952
1979	2034056
1980	1978165
1981	2009210
1982	2027218
1983	2013325
1984	1944845
1985	1886100
1986	1864080
1987	1930870
1988	1941599
1989	2085271
1990	2283426
1991	2470059
1992	2477121
1993	2495725
1994	2561268
1995	2726636
1996	2545317
1997	2735816
1998	2642833
1999	2707099
2000	2761724
2001	2614460
2002	2712234
2003	2751930
2004	2755787
2005	2975160
2006	3002359
2007	2911543
2008	3186032
2009	3179076
2010	2992580
2011	3037991
2012	3268112
2013	3311233
2014	3291950
2015	3251394
2016	3224925
2017	3097555
2018	2592349
2019	3623430
2020	3134051
2021	3146954
2022	3226804