Estimate Daily energy requirement and safe protein intake?

The estimated mean daily per capita energy requirement of 2070 Kcal rounded up  to 2100 Kcal is based on WHO technical report- No. 724 published in 1985 and on  the following assumptions:

• The age/sex distribution of the population is a characteristic of developing countries
• The mean height of adult men and women are 169 cm and 155 cm respectively, which is the approximate value in sub-Saharan Africa
• The body mass index (BMI) (kg/m2 ) is between 20-22
• Physical activity is light
• All infants are breast-fed from birth to 6 months, and half of the infants of 6- 11 months are still breast-feeding and deriving half of their energy and protein requirement from breast milk
• Safe daily protein intake, from an average mixed diet of cereals, pulses and vegetables is estimated to be 46 g.