How Often Does SEP 12.1 Definitions Update?

We've noticed that the virus, IPS, and Download Protection definitions are updating each day.  However, our SONAR detections appear to be stuck on 3/1/2013 r11. 

My question is does SONAR update with the other definition packages, or is 3/1/2013 r11 the most current SONAR defnition?

Thanks,

Nathan