TWIN FALLS, Idaho (AP) — The March of Dimes has given Idaho high marks for its relatively low premature birth rates.

Idaho earned an A on the 2015 March of Dimes Premature Birth Report Card released earlier this month. The report card compares the state's preterm birth rate with the March of Dimes' goal of 8.1 percent by 2020. Overall, Idaho currently met the agency's goal.

However, the Times-News reports certain pockets through the state are much higher. The March of Dimes reports that four counties' 2013 preterm birth rates were worse than the statewide rate.

Canyon County's rate of 10.1 percent was the highest, followed by Bannock County at 10 percent, Twin Falls County at 9.8 percent and Bonneville County at 9.7 percent. Idaho was ranked 20th on a disparity index that measures the gaps between racial and ethnic groups.