Potential Suppo Ratio (PSR) is defined as:
Number of persons aged 15-65 per children below 15 years Number of persons aged 15-65 per one older person aged >/= 65 years Number of person aged 15-65 per one older person aged > 65 and younger person < 15 years Number of persons aged 15-65 persons older person aged > 60 and younger person < 15 years