Frequencies for pn3bip variable in hvbp_pn_02_18_2015 dataset :

        PN-3b |
  Improvement |
       Points |      Freq.     Percent        Cum.
--------------+-----------------------------------
           0  |      1,322       42.87       42.87
           1  |         99        3.21       46.08
           2  |        114        3.70       49.77
           3  |        108        3.50       53.27
           4  |        133        4.31       57.59
           5  |        176        5.71       63.29
           6  |        166        5.38       68.68
           7  |        180        5.84       74.51
           8  |        115        3.73       78.24
           9  |        449       14.56       92.80
Not Available |        222        7.20      100.00
--------------+-----------------------------------
        Total |      3,084      100.00

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