1985=72,1; 1986=78,1; 1987=86,1; 1988=93,1; 1989=100,1; 1990=103; 1991=113; 1992=118; 1993=124; 1994=131; 1995=137; 1996=142; 1997=146; 1999=157; 2000=165; 2001=171; 1998=152,1; 2002=175; 2003=177; 2004=182; 2005=184; 2006=189 von: FAO: FAO plant production and protection paper (ISSN: 0259-2517)