The state comptroller shall, on or before February first in each year, transmit to the state board of education and to the county treasurer of each county a statement of the amount of tax appropriated by the state for that year and to be raised by taxation for the public schools. The comptroller shall apportion that tax among the several counties in proportion to the amount of taxable real and personal property of the counties respectively as shown by the last annual abstracts of ratables prepared by the state tax commissioner and transmitted by him to the comptroller.