It's very uncommon, especially in the United States.
According to the CDC (http://1.usa.gov/1pHeqhR), "in 2013, 49 states and Puerto Rico claimed 5,865 cases of rabies
in animals and 3 human rabies cases to CDC." That said, rabies is a terrible disease that is almost universally fatal. Any possible exposure to rabies requires emergent evaluation and possible treatment with early vaccination.