Frequencies for s2_1_c7_3 variable in prds_hosp10_yr2010 dataset :

  s2_1_c7_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         29        1.25        1.25
          O |        531       22.86       24.11
          P |      1,734       74.64       98.75
          T |         29        1.25      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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