The latest estimates from the Pew Hispanic Center found that much of the country's 2010 unauthorized immigrant population remained virtually unchanged from 2009. California, however, remained at the top of the pack, being home to the nation's highest population of illegal immigrant residents and laborers. "California has by far the largest unauthorized-immigrant population (2.55 million). It also is among the states where unauthorized immigrants constitute the largest shares of the overall populations," the report stated. The Pew study found that unauthorized immigrants constituted 6.8% of the overall population in the state. While unauthorized immigrants are spread all throughout each of the 50 States, California is among the few states where they live in heavily concentrated amounts. Californians For Population Stabilization Click here to read the full article.