The total sum appropriated by the Legislature from the State General Fund for any fiscal year shall not exceed ninety-eight percent (98%) of the general fund revenue estimate for that fiscal year developed by the Department of Revenue and the University Research Center and adopted by the Joint Legislative Budget Committee. The unencumbered balances in general funds that will be available and on hand at the close of the fiscal year shall not include projected amounts required to be deposited into the Working Cash-Stabilization Reserve Fund under Section 27-103-203. However, for fiscal years 2010, 2011, 2012, 2015, 2016 and 2017 only, the total sum appropriated by the Legislature from the State General Fund shall not exceed one hundred percent (100%) of the amount of the general fund revenue estimate for that fiscal year, and for fiscal year 2018, the total sum appropriated by the Legislature from the State General Fund shall not exceed ninety-nine percent (99%) of the amount of the general fund revenue estimate adopted by the Joint Legislative Budget Committee for that fiscal year.