Trends in Naturalization Rates (PDF, 2 pages): “This report examines the trends in naturalization rates of different cohorts and regions of birth.”
“Asian immigrants had the highest cumulative naturalization rates and Mexican immigrants had among the lowest. Asian immigrants naturalized at a rate of approximately 70 percent for the 1973 to mid-1980s cohorts and 60-65 percent for the later cohorts. Mexican immigrants naturalized at a rate of 45-50 percent for the 1970s cohorts, 35-40 percent for the 1980s cohorts, and 20-30 percent for the 1990s cohorts. The higher rate for the 1989 cohort of Mexican LPRs and the subsequent lower rate for the 1990 cohort reflect naturalization propensities of different classes of IRCA-based LPRs. Europeans naturalized at a rate of approximately 40-50 percent for the 1970s and 1980s cohorts and 50-60 percent for the 1990s cohorts. The higher rates for more recent cohorts of European LPRs reflect compositional changes, most notably the increase in refugees associated with the dissolution of the Soviet Union.”
