2. The amount of ad valorem taxes which would have been produced by the rate upon which the tax is levied each year by or for each taxing authority, exclusive of any debt service millage, upon the total of the assessed value of the taxable real property in the community redevelopment area as shown upon the most recent assessment roll used in connection with the taxation of such property by each taxing authority prior to the effective date of the ordinance providing for the funding of the trust fund. However, the governing body may, in the ordinance providing for the funding of a trust fund established with respect to any community redevelopment area, determine that the amount to be funded by each taxing authority annually shall be less than 95 percent of the difference between subparagraphs 1. and 2., but in no event shall such amount be less than 50 percent of such difference.