In every county in this state, the salary of all county officers named in paragraph 1 of Section 180.61 of this title shall be increased from the applicable basic salary named in Section 180.62 of this title, for gross assessed valuation or serviceability, according to the following scale: A. To the basic salary:
1. Add the product of One Hundred Dollars ($100.00) times each One Million Dollars ($1,000,000.00) gross assessed valuation, or major fraction thereof, until a gross assessed valuation of Seventy- five Million Dollars ($75,000,000.00) is reached;
2. Thereafter add the product of One Hundred Dollars ($100.00) times each additional Five Million Dollars ($5,000,000.00) gross assessed valuation, or major fraction thereof, until a gross assessed valuation of Five Hundred Million Dollars ($500,000,000.00) is reached;
3. Thereafter add the product of One Hundred Twenty-five Dollars ($125.00) times each additional Seven Million Dollars ($7,000,000.00) gross assessed valuation, or major fraction thereof, until a gross assessed valuation of Two Billion Dollars ($2,000,000,000.00) is reached; and 4. Thereafter as to all additional gross assessed valuation add the product of One Hundred Twenty-five Dollars ($125.00) times each additional Twenty Million Dollars ($20,000,000.00) gross assessed valuation, or major fraction thereof. B. Also, the salary of each county officer shall be additionally increased from the basic salary named in Section 180.62 of this title, and the additions thereto heretofore provided in this section, for population or service load according to the following scale:
1. The product of Twelve Dollars and fifty cents ($12.50) times each one thousand (1,000) population, or major fraction thereof, until a population of seventy-five thousand (75,000) is reached; thereafter;
2. The product of Twelve Dollars and fifty cents ($12.50) times each additional five thousand (5,000) population, or major fraction thereof, until a population of one hundred fifty thousand (150,000) is reached; thereafter add; and 3. The product of Twelve Dollars and fifty cents ($12.50) times each additional ten thousand (10,000) population, or major fraction thereof. C. This section shall not reduce the present salary of any county officer in Oklahoma during their present term of office.