Foreclosure rates in Greater Des Moines decreased in November 2011 from the same period in 2010, according to newly released data from CoreLogic Inc. Foreclosures dropped to 2.48 percent in November 2011, compared with 2.69 percent in November 2010, the real estate research company said. On a year-over-year basis, the foreclosure rate in Des Moines-West Des Moines decreased 12.48 percent. Foreclosure activity in Des Moines-West Des Moines is lower than the national foreclosure rate, which was 3.41 percent for November 2011. The number of mortgages that were 90 or more days delinquent declined to 4.71 percent from 4.81 percent a year earlier, CoreLogic said. On a year-over-year basis, the mortgage delinquency rate has decreased 7.27 percent.