FAO: 50% of world poultry production comes from four countries

The latest Food and Agriculture Organization - FAO statistics on world chicken meat production, from 2009, show that in the year were produced 80.3 million tons of chicken meat, 2.4% and 45.4% more than, respectively, 2008 and1999.
According to the data the production came from over 204 countries, however 50.2% of that volume came from 4 countries, only - USA,  20.3% of the total; China, 14.2%; Brazil, 12.4% and México, 3,3%.
The top-20 in the year responded for 75% of the world production. Based on FAO’s data, it is possible to conclude that 4 countries responded for 50% of the world production, 16 countries for 25% while the remaining 184 countries for 25%.