There is authorized to be appropriated not to exceed $500,000 for the fiscal year ending June 30, 1968, $750,000 for the fiscal year ending June 30, 1969, $1,000,000 for the period beginning July 1, 1969, and ending June 30, 1973, and $400,000 for each of the fiscal years ending June 30, 1974, June 30, 1975, June 30, 1976, and June 30, 1977.