A supporter of Andres Manuel Lopez Obrador, presidential candidate for the Party of the Democratic Revolution (PRD), takes part in a blockade of Mexican bank Banamex's corporate headquarters in Mexico City, August 14, 2006. Tomas Bravo/Reuters
Farmers work at a lettuce field in the town of Ixmiquilpan, in the Mexican state of Hidalgo, on April 24, 2012. Combined with tighter border security, the US economy's slow recovery from recession and drug violence along the Mexican side of the border, the tougher deportation policy has sent net migration flows from Mexico to 'El Norte' falling to zero for the first time in living memory. Tomas Bravo/Reuters
A man carries a box on his shoulders in downtown Mexico City, February 14, 2013. Edgard Garrido/Reuters
Wind turbines are seen in La Ventosa, Mexico, February 7, 2012. Surrounded by towering turbines in every direction, the town of La Ventosa - which means 'the windy place' in Spanish - is at the heart of a wind power boom in the country. Mexico, the world's 14th biggest economy, still punches well below its weight in terms of wind energy, ranking 24th on the planet in installed capacity last year, according to the Global Wind Energy Council (GWEC). But the market is growing fast. Jorge Luis Plata/Reuters
A man carries a product on his shoulders in front of a store selling handbags in downtown Mexico City, February 14, 2013. Edgard Garrido/Reuters
Job seekers prepare to register to apply for vacancies at a job fair in Monterrey, northern Mexico, February 24, 2009. Hundreds came looking for a new job after the unemployment rate spiked to 5 percent in January, as the US recession hit Mexico with Americans buying fewer cars, televisions and other goods made south of the border. Tomas Bravo/Reuters
Cargo is unloaded in the port of Veracruz, Mexico on, November 17, 2011. Alfredo Sosa/The Christian Science Monitor
A man waits with his shopping boxes next to a poster that reads 'Crazy $1 February' in downtown Mexico City on, February 14, 2013. Mexico's ambitious agenda of economic reforms could unleash pent-up spending by low and middle-income earners if the economy gathers steam and more on-the-books employment gives workers easier access to credit. Edgard Garrido/Reuters
Billboards are seen next to a freeway in Mexico City on, February 14, 2013. Edgard Garrido/Reuters
Cowboys stand together at a livestock auction house in Chihuahua, Mexico, on February 17, 2012. A severe drought in Mexico that has cost farmers more than a billion dollars in crop losses alone and set back the national cattle herd for years, is just a foretaste of the drier future facing Latin America's second largest economy. Tomas Bravo/Reuters
A carpentry shop in Veracruz, Mexico, on November 17, 2011. Alfredo Sosa/The Christian Science Monitor
Unfinished apartments are seen on the outskirts of Mexico City on, April 12, 2013. Latin America's second largest economy has a young population, high employment and a housing deficit of about 9 million houses but the biggest home builders overspent on land they are now struggling to sell. Henry Romero/Reuters
President Peña Nieto signed new rules opening state-run oil, gas, and electricity industries to private and foreign companies, saying average Mexicans would gain lower prices and more jobs. Mexico nationalized its oil industry in 1938.
ByMark Stevenson, Associated Press
Mexican President Enrique Peña Nieto signed into law on Monday new rules governing a historic opening of the state-run oil, gas, and electricity industries to foreign and private companies.