DES MOINES, Iowa (AP) — A new study says Des Moines is one of the best performing cities when it comes to funding its retirement pension fund. Omaha, Neb., is one of the worst. The study released Tuesday by Pew Charitable Trusts, a nonprofit public policy organization, says 16 cities funded 80 percent of the total liability in the fund and consistently made at least 90 percent of their annual recommended pension payments. Among them: Des Moines, Dallas, and Seattle.

Six cities regularly made less than two-thirds of their annual recommended contributions. They include Chicago, Omaha, and Portland, Ore. Pew examined pensions in 61 cities — the most populous one in each state — plus all others with populations over 500,000. It used data for 2007 through 2009, the most recent available.