A fine not exceeding $2,000 or imprisonment for a period not to exceed 15 days, or both, for a conviction of a first offense; for a conviction of a second offense, both of which were committed within a period of five years, a fine of not less than $2,000 nor more than $5,000 or imprisonment for a period not to exceed 15 days, or both; and upon conviction for a third or subsequent offense, all of which were committed within a period of five years, a fine of not less than $5,000 nor more than $10,000 or imprisonment for a period not to exceed 15 days, or both; or