Frequencies for mort30pnip variable in hvbp_outcome_11_17_2015 dataset :

   MORT-30-PN |
  Improvement |
       Points |      Freq.     Percent        Cum.
--------------+-----------------------------------
           0  |      1,042       34.27       34.27
           1  |        102        3.35       37.62
           2  |        135        4.44       42.06
           3  |        149        4.90       46.96
           4  |        154        5.06       52.02
           5  |        170        5.59       57.61
           6  |        171        5.62       63.24
           7  |        118        3.88       67.12
           8  |        128        4.21       71.33
           9  |        357       11.74       83.06
Not Available |        515       16.94      100.00
--------------+-----------------------------------
        Total |      3,041      100.00

by Jean Roth , jroth@nber.org , 15 Nov 2016