Frequencies for s2_1_c7_3 variable in prds_hosp10_yr2012 dataset :

  s2_1_c7_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         98        1.57        1.57
          O |      1,353       21.73       23.30
          P |      4,685       75.24       98.54
          T |         91        1.46      100.00
------------+-----------------------------------
      Total |      6,227      100.00

by Jean Roth , jroth@nber.org , 24 Aug 2018