For public libraries operated by cities, funds granted under this chapter may not exceed thirty-three percent of the total expenditure of mill levy moneys and other public funds during the preceding year. For public libraries operated by counties, funds granted under this chapter may not exceed the following percent of the total expenditure of mill levy moneys and other public funds during the preceding year:

less than $10,000                100 percent $10,000 – $19,999                 75 percent $20,000 – $29,999                 67 percent $30,000 – $50,000                 50 percent over $50,000                         33 percent