According to the California Chamber of Commerce, Mexico continues to be California's number one export market. California exports to Mexico totaled $21 billion in 2010. Mexico purchases 15 percent of all California exports. The Tomás Rivera Policy Institute published a study in 2004 titled “The Economic Impact of the México-California Relationship.” This study assessed the estimated total value of the México-California relationship at over $156 billion annually. The same study revealed that there were over 200,000 jobs every year in California supported by the México-California relationship.