The gap between rich and poor nations is not occurring everywhere: one group of poor nations is closing the gap with rich economies, while a second group of poor countries is falling further behind. For example, China is narrowing the income gap between itself and the United States as measured by GDP per capita, but the gap between Africa and the United States is widening. China's progress is no doubt a result of its integration with the world economy and annual economic growth rates of around 9 percent.