Frequencies for ami8aip variable in hvbp_ami_02_25_2014 dataset :

     AMI-8a |
Improvement |
     Points |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        533       19.54       19.54
          1 |         23        0.84       20.38
          2 |         33        1.21       21.59
          3 |         46        1.69       23.28
          4 |         63        2.31       25.59
          5 |         58        2.13       27.71
          6 |         64        2.35       30.06
          7 |         68        2.49       32.55
          8 |         48        1.76       34.31
          9 |        317       11.62       45.93
          . |      1,475       54.07      100.00
------------+-----------------------------------
      Total |      2,728      100.00

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