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"The city proper's nominal GDP per capita is $17,696, the highest of any city in Latin America.[30] Mexico City's Human Development Index (HDI) is the highest in the country at 0.8830, higher than the national average. Amongst other welfare indicators 50% of the habitants of Mexico City have access to the Internet, 58% own a cell phone, with virtually each household having a phone line, and while 36% of Mexicans nationwide live in poverty, 15% of the residents of Mexico City do. Mexico is also one of the largest financial and commercial hubs in Latin America. The Mexican stock exchange (Bolsa Mexicana de Valores) and the country's largest banks and insurers as well as many international financial services conglomerates for Latin America are headquartered in the city. Amongst them Banamex (acquired by Citigroup) is the largest, which generates almost three times as much revenues than all 16 Citigroup's branches in the rest of Latin America.[31]. Most of the conglomerates are headquartered at Santa Fe, one of the business districts of the city."...
While no official figures have been reported by INEGI, population estimates of each of these communities are quite significant. Mexico City is also home to the largest population of Americans living outside the United States. Some estimates are as high as 600,000 Americans living in Mexico City, while in 1999 the U.S. Bureau of Consular Affairs estimates over 440,000 Americans lived in the Mexico City Metropolitan Area"
