The elimination of most public stocks in OECD countries and the privatization of most State-trading enterprises have concentrated knowledge concerning agricultural commodity availability in the hands of a small number of companies which maintain this information as proprietary. One of the most important elements of the Action Plan on Food Price Volatility, agreed by the G20 Agriculture Ministers at their meeting held in Paris on 22 and 23 June 2011, was the launching of the Agricultural Market Information System (AMIS) to improve market information and transparency of data on current stocks, and promote coordination of policy responses (see Ministerial declaration, para. Second, assuming the role traditionally played by the United States of America and China as stock holders, the international community should maintain a minimum level of world food stock.