The FBI has just released its estimates for 2008 crime rates. The violent crime rate peaked in 1991 at 758.2 crimes per 100,000 population. Violent crimes include homicide, aggravated assaults, and forcible rapes. In 2008, the violent crime rate dropped to its lowest recorded level of 454.5 per 100,000 people. In addition, the property crime rate has also fallen from its 1991 peak of 5,140.2 per 100,000 to its lowest recorded rate of 3,212.5 per 100,000 in 2008.
For complete FBI crime rate tabulations go here.