The BJS released a report this summer (July, 2006) on trends among state prosecution offices. The state prosecution system cost the country close to $5 billion in 2005, to process close to 10 million criminal cases. These offices cleared about 2.5 million felony cases and about 7.5 million misdemeanor cases, but states count cases differently, making it difficult to tell how many people were involved in those prosecutions. Only 3% of their felony cases were resolved by a jury trial.

The report generally breaks down information based on the size of state prosecution offices, separating small offices from larger ones. The report includes information on the physical safety of prosecutors (with an estimate that 3% of chief prosecutors were assaulted in 2005 and 6% of assistant prosecutors were assaulted), trends involving DNA evidence, terrorism and computer-crime prosecution, and other broad information about the state prosecution system.

Source: http://www.ojp.usdoj.gov/bjs/abstract/psc05.htm [1]