WASHINGTON (AP) — Multiracial Americans have become the fastest growing demographic group. The latest census estimates show the number of multiracial people rose 3.4 percent last year to about 5.2 million. They now make up 5 percent of the minority population — with millions more believed to be uncounted. Demographers say the public profile of golfer Tiger Woods and President Barack Obama, a self-described “mutt,” is having an impact on those who might self-identify as multiracial. California, Texas, New York and Florida had the most multiracial people, due partly to higher populations of second- and later-generation immigrants who “marry out.” Measured by percentages, Hawaii ranked first with nearly 1 in 5 residents who were multiracial.