Approximately 18,650 persons died during a hospital stay related to these serious MRSA infections in the US in 2005.

Serious MRSA disease is still predominantly related to exposures to healthcare delivery:

About 85% of all invasive MRSA infections were associated with healthcare, and of those, about two-thirds occurred outside of the hospital, while about one third occurred during hospitalization.
About 14% of all the infections occurred in persons without obvious exposures to healthcare.
Although the rates of disease varied between the geographically diverse sites participating in the surveillance, overall rates of disease were consistently highest among older persons (age >65), Blacks, and males.

( Source CDC WEbsite http://www.cdc.gov/ )