Frequencies for first 10,000 rows of npp_type_cd variable in pos2010 dataset :

    TYPE OF |
NON-PARTICI |
     PATING |
   PROVIDER |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,911       99.11       99.11
          E |         28        0.28       99.39
          F |         61        0.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017