Marriage duration almost twice as long in South Dakota as in DC

Longest Marriages – States – The median span of marriages in South Dakota is almost twice that of D.C. – Bloomberg Best & Worst.

(This appears not to be duration of marriage at time of divorce, which is reported fairly often, but instead duration of current marriage among census respondents generally.)  This arguably is a statistic that is of more interest to anthropologists than judges, but if conflict resolution is an aim of judges then maybe that is not true.