Frequencies for first 10,000 rows of npp_type_cd variable in pos2013 dataset :

Non-Partici |
     pating |
   Hospital |
  Type Code |      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 , 26 Jan 2016