Okla. Stat. tit. 62, § 57.126

The State Treasurer shall deposit in the sinking fund, in addition to all other amounts required to be deposited therein, the following sums for the following fiscal years for the payment of the principal upon the Series A Bonds: FISCAL YEAR BEGINNING JULY 1 AMOUNT 1969 -0- 1970 -0- 1971 $ 850,000.00 1972 900,000.00 1973 1,000,000.00 1974 1,000,000.00 1975 1,100,000.00 1976 1,100,000.00 1977 1,200,000.00 1978 1,300,000.00 1979 1,300,000.00 1980 1,400,000.00 1981 1,500,000.00 1982 1,550,000.00 1983 1,650,000.00 1984 1,750,000.00 1985 1,850,000.00 1986 1,950,000.00 1987 2,050,000.00 1988 2,150,000.00 1989 2,250,000.00 1990 2,450,000.00 Laws 1969, c. 339, § 6, emerg. eff. May 8, 1969.