This statistic shows the U.S. mortgage delinquency rates in 2010, by loan type. The delinquency rate for prime conventional loans stood at 6.5 percent that year. Delinquency rates refer to the number of loans delinquent 30 days or more as a percentage of the number of mortgage loans serviced. Annual averages are based on quarterly figures. The figures do not include loans in the process of foreclosure.