Frequencies for ami7astr variable in hvbp_ami_10_28_2014 dataset :

       AMI-7a |
Measure Score |      Freq.     Percent        Cum.
--------------+-----------------------------------
  1 out of 10 |          1        0.03        0.03
Not Available |      3,088       99.97      100.00
--------------+-----------------------------------
        Total |      3,089      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016