According to the Public Policy Institute of California (PPIC), 37 percent of the state’s immigrants who are 25 or older did not complete high school in 2011. Overall, 25 percent of immigrants have college degrees. However, 47 percent of immigrants in California who arrived between 2007 and 2011 earned a four-year degree or higher.
By contrast, only 9 percent of U.S. born Californians 25 or older dropout of high school. They accounted for about 28 percent of all high school dropouts, while foreign-born students accounted for the rest.
The study was conducted by Hans Johnson and Marisol Cuellar Mejia of PPIC and it covered a broad range of statistics on immigrants in California. The following graph shows that California has steadily increased its immigrant population since the 1960s and has always had a higher proportion of immigrants than the U.S. as a whole