Frequencies for pn6ip variable in hvbp_pn_02_25_2014 dataset :

       PN-6 |
Improvement |
     Points |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        977       35.81       35.81
          1 |         99        3.63       39.44
          2 |        141        5.17       44.61
          3 |        153        5.61       50.22
          4 |        152        5.57       55.79
          5 |        199        7.29       63.09
          6 |        200        7.33       70.42
          7 |        169        6.20       76.61
          8 |        105        3.85       80.46
          9 |        480       17.60       98.06
          . |         53        1.94      100.00
------------+-----------------------------------
      Total |      2,728      100.00

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