Annually, at the time required by law for the levying of taxes for county purposes, the proper county officers required by law to make and enter such tax levies shall make and enter a tax levy or levies for said county tax refund fund, which said levy or levies shall be given precedence over all other tax levies for county and/or taxing district purposes, as follows:
The aforesaid levy or levies shall also include a proper share of the interest paid out of the county tax refund fund during said twelve months upon warrants issued against said fund in payment of such judgments, legal interests and costs, plus such an additional amount as such levying officers shall deem necessary to meet the obligations of said fund, taking into consideration the probable portions of such taxes that will not be collected or collectible during the year in which they are due and payable, and also any unobligated cash on hand in said fund.
RCW 84.68.040