The Illinois Department of Public Health has added the rates of breastfeeding of newborns for each hospital. The Hospital Report Card can be found at http://www.healthcarereportcard.illinois.gov.
Presumably, hospitals that have a high percentage of babies going home breastfeeding, have a staff that are very supportive of helping a new mother and baby establish a good start on breastfeeding.
Along with checking a hospital’s report card, you could also call the hospital and ask what will be offered in support of lactation.