Asians have made up an increasing proportion of the foreign-born Americans: "In 1960, Asians represented 5 percent of the U.S. foreign-born population; by 2014, their share grew to 30 percent of the nation's 42.4 million immigrants." As of 2016, "Asia is the second-largest region of birth (after Latin America) of U.S. immigrants." In 2013, China surpassed Mexico as the top single country of origin for immigrants to the U.S. Asian immigrants "are more likely than the overall foreign-born population to be naturalized citizens"; in 2014, 59% of Asian immigrants had U.S. citizenship, compared to 47% of all immigrants. Postwar Asian immigration to the U.S. has been diverse: in 2014, 31% of Asian immigrants to the U.S. were from East Asia (predominately China and Korea); 27.7% were from South Asia (predominately India); 32.6% were from Southeastern Asia (predominately the Philippines and Vietnam) and 8.3% were from Western Asia.