The following commentary comes from an independent investor or market observer as part of TheStreet's guest contributor program, which is separate from the company's news coverage.By David Sterman NEW YORK ( StreetAuthority) -- Every few weeks, another major manufacturer announces plans to shut down production in China and bring jobs closer to home. Some companies such as GE ( GE) aim to boost production in the U.S. (GE will make hot water heaters in Kentucky, for example). That's because China is no longer the bargain it once was, thanks to a rising minimum wage and a strengthening currency. It's important for investors to be aware of this trend, because economists say it will only build in the years to come, as China's wages and currency are expected to rise even higher. Perhaps the greatest beneficiary of this trend will be Mexico, which will always remain a low-cost environment for manufacturers. Since the North American Free Trade Agreement was ratified in 1994, Mexico has seen a steady rise in goods shipped north of the border. More than 70% of Mexico's exports head to the U.S., and that figure is expected to hit 75% in 2012. It's telling that even as global economies slumped in 2011, Mexico's exports still rose 13% to $336 billion, according to the CIA World Factbook.