By MIKE STOBBE NEW YORK (AP) — U.S. kindergarten vaccination rates dipped last year and the proportion of children with exemptions rose to an all-time high, according to federal data posted Tuesday. The share of kids exempted from vaccine requirements rose to 3.3%, up from 3% the year before. Meanwhile, 92.7% of kindergartners got their required shots, which is a little lower than the previous two years.