For injuries resulting in total disability occurring after July 1, 1975, the compensation to be paid during the continuance of total disability shall be 662/3% of the wages of the injured employee, as defined by this chapter, but the compensation shall not be more than 662/3% of the average weekly wage per week as announced by the Secretary of the Department of Labor for the last calendar year for which a determination of the average weekly wage has been made, nor less than 222/9% of the average weekly wage per week. If at the time of the injury the employee receives wages of less than 222/9% of the average weekly wage per week, then the employee shall receive the full amount of such wages per week, as compensation. Nothing in this section shall require the payment of compensation after disability ceases.