The document provides data on the months supply of housing inventory (MSI) in Alameda County, California from March 2007 to March 2009. It shows that the MSI decreased from 4.8 months in March 2007 to 3.0 months in March 2009, a decline of 1.9 months or 38.7%. The national MSI reported by the NAR also declined over this period from 4.9 months to 4.9 months.