The Fannie Mae serious delinquency rate peaked in February 2010 at 5.59%.
Earlier Freddie Mac reported that the Single-Family serious delinquency rate declined in February to 3.15% from 3.20% in January. Freddie's rate is down from 3.57% in February 2012, and this is the lowest level since July 2009. Freddie's serious delinquency rate peaked in February 2010 at 4.20%.
Note: These are mortgage loans that are "three monthly payments or more past due or in foreclosure".
Click on graph for larger imageAlthough this indicates some progress, the "normal" serious delinquency rate is under 1%. At the recent pace of improvement, it will take several years until the rates are back to normal. At the recent rate of improvement, the serious delinquency rate will be under 1% in 2017 or so.