The mandatory annual contribution to the Fund must equal the greater of:
(a) 50 percent of any excess revenue; or
(b) an annual amount equal to the lesser of 0.5 percent of the Adjusted Governmental Revenues or the amount needed to obtain a total reserve of 10 percent of the Adjusted Governmental Revenues. (1993 L.M.C., ch. 41, § 1; 2010 L.M.C., ch. 33, § 1.)