It is estimated that when workers support retirees, r * would be ______ %, and when each generation is self-sufficient, r* would be ______ %.

It is estimated that when workers support retirees, r * would be ______ %, and when each generation is self-sufficient, r* would be ______ %.

It is estimated that when workers support retirees, r * would be ______ %, and when each generation is self-sufficient, r* would be ______ %.
It is estimated that when workers support retirees, r * would be ______ %, and when each generation is self-sufficient, r* would be ______ %.