Commodity200520062007200820092010
Worked slate & arts. of slate/agglom. slate$386,565,687$403,962,578$459,610,827$422,451,241$349,314,620$351,858,371
Total$386,565,687$403,962,578$459,610,827$422,451,241$349,314,620$351,858,371