There are authorized to be appropriated for the purposes of this chapter, $10,000,000 for the fiscal year ending June 30, 1966; $20,000,000 for the fiscal year ending June 30, 1967; $30,000,000 for the fiscal year ending June 30, 1968; $6,600,000 for the fiscal year ending June 30, 1969; $10,000,000 for the fiscal year ending June 30, 1970; $10,000,000 for the fiscal year ending June 30, 1971.