Year Hectares 1990 4817000 1991 4725300 1992 4633600 1993 4541900 1994 4450200 1995 4358500 1996 4266800 1997 4175100 1998 4083400 1999 3991700 2000 3900000 2001 3847200 2002 3794400 2003 3741600 2004 3688800 2005 3636000 2006 3636000 2007 3636000 2008 3636000 2009 3636000 2010 3636000 2011 3636000 2012 3636000 2013 3636000 2014 3636000 2015 3636000