Frequencies for ami8aipstr variable in hvbp_ami_10_28_2014 dataset :

       AMI-8a |
  Improvement |
       Points |      Freq.     Percent        Cum.
--------------+-----------------------------------
   0 out of 9 |        633       20.49       20.49
   1 out of 9 |         43        1.39       21.88
   2 out of 9 |         36        1.17       23.05
   3 out of 9 |         60        1.94       24.99
   4 out of 9 |         60        1.94       26.93
   5 out of 9 |         75        2.43       29.36
   6 out of 9 |         67        2.17       31.53
   7 out of 9 |         63        2.04       33.57
   8 out of 9 |         38        1.23       34.80
   9 out of 9 |        307        9.94       44.74
Not Available |      1,707       55.26      100.00
--------------+-----------------------------------
        Total |      3,089      100.00

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