New born infants from 140 down to 130 per minute. During 1st year from 130 down to 115 per minute. During 2d year from 115 down to 100 per minute. During 3d year from 105 down to 95 per minute. During 7th to 14th year from 90 down to 80 per minute. During 14th to 21st year from 85 down to 75 per minute. During 21st to 60th year from 75 down to 70 per minute. In old age from 75 up to 80 per minute.