Shall There Be An Extension Until June 30, 2030, Of The Aggregate 0.1 Percent Sales And Use Taxes Currently Levied And Collected By The Denver Metropolitan Scientific And Cultural Facilities District That Are Scheduled To Expire On June 30, 2018, For Assisting Scientific And Cultural Facilities Within The District, While Authorizing The District To Continue To Collect, Retain, And Spend All Revenue Generated By Such Tax In Excess Of The Limitation Provided In Article X Of Section 20 Of The Colorado Constitution And While Modifying The Rates Of The Three Individual Sales And Use Taxes Collected By The District As Follows: For Total Annual Revenues Collected By The District Up To Thirty-Eight Million Dollars, Decreasing The .0655 Percent Sales And Use Tax To .064 Percent; Increasing The .021 Percent Sales And Use Tax To .022 Percent; And Increasing The .0135 Percent Sales And Use Tax To .014 Percent; And, For Total Annual Revenues Collected By The District That Exceed Thirty-Eight Million Dollars, Decreasing The .064 Percent Sales And Use Tax To .057 Percent; Increasing The .022 Percent Sales And Use Tax To .026 Percent; And Increasing The .014 Percent Sales And Use Tax To .017 Percent?