Frequencies for ptype variable in impact2016 dataset :

   Provider |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,607       75.63       75.63
          7 |        189        5.48       81.11
          8 |         32        0.93       82.04
         14 |        150        4.35       86.39
         15 |         13        0.38       86.77
         16 |        328        9.52       96.29
         17 |        126        3.66       99.94
         21 |          1        0.03       99.97
         22 |          1        0.03      100.00
------------+-----------------------------------
      Total |      3,447      100.00

by Jean Roth , jroth@nber.org , 30 Aug 2017