Falling delinquency and foreclosure rates over the last few years have continued to break recent records, according to industry sources, thanks to several factors including an improved housing market and price appreciation. As of the end of March, only 4.95 percent of the $5.08 trillion of home mortgages covered by the Inside Mortgage Finance Large Servicer Delinquency Index were in default or foreclosure status. That was down from 5.54 percent at the end of the fourth quarter. The figures are not seasonally adjusted. The Mortgage Bankers Association reported...[Includes one data table]