The answer to the headline question depends on which data source you’re looking at.
According to the Illinois Association of Realtors (IAR), the volume of May 2014 home sales in Illinois was 9.4% lower than in May 2013, but 16.4% higher than in April 2014. IAR aggregates data from 30 participating Multiple Listing Services.
According to RealtyTrac, May 2014 home sales volume was 14% higher than May 2013 volume, and 1% higher than April 2013 volume. RealtyTrac compiles data from a variety of sources.