What type of incidence rate is this

Chittenden County Health Department reported 17 new cases of lyme disease in the first half of 1994 and 18 aIDitional cases during the second half of the year. The population of the county was 204,500 at the beginning of the year and 215,000 at the end of the year. What was the incidence rate of lyme disease in Chittenden County in 1994? What type of incidence rate is this?