A "--" in the district column means, that the town is a district-free town, i.e. it is by itself a district.
... 82.46% White, 7.39% African American, 0.08% Native American, 1.62% Asian, 0.08% Pacific Islander, 5.94% from other races, and 2.43% from two or more races. 16.62% of the ...