The demand from mainland Chinese eager to move abroad has already led the U.S. government to warn the program could hit a wall as early as this summer. Chinese nationals account for more than 80% of visas issued, compared to just 13% a decade ago, according to government data compiled by CNNMoney. That translates to nearly 6,900 visas for Chinese nationals last year, a massive bump up from 2004, when only 16 visas were granted to Chinese. http://money.cnn.com/2014/03/25/news/economy/china-us-immigrant-visa/index.html?iid=Lead