Mortgage bankers trade group says 1st quarter figures show slight increase in 30-day delinquency rate.
TransUnion says rate of mortgage holders more than 60 days behind now at 5.19%, primarily driven by older loans.
Credit cards, auto loans, mortgage loans, home equity all show improvement; student loans the exception.
Credit reporting agency says 9% drop in past six months.
Commercial and multifamily mortgage delinquent loans were down for credit unions, banks and thrifts during the first quarter.
The rate of homeowners behind on their mortgage has dropped to its lowest level in more than three years, according to TransUnion.