Share of processed agricultural products and agricultural commodities trade increased from 25% to 58
"Trade of agricultural products has not only been growing in absolute values, but with liberalization the composition of world agri-food exports has altered. By the end of the 1990s, the share of processed agricultural products trade in relation to commodities had increased from 24.7 % in 1970 to 58.2%...
"Carlos Arthur B. da Silva, "The Growing Role of Contract Farming in Agri-Food Systems Development: Drivers, Theory and Practice," Food and Agriculture Organization (Rome, July 2005). Accessed on April 15, 2014. http://www.fao.org/fileadmin/user_upload/ags/publications/AGSF_WD_9.pdf