Frequencies for s2_1_c7_3 variable in prds_hosp10_yr2011 dataset :

  s2_1_c7_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         70        1.14        1.14
          O |      1,350       21.95       23.09
          P |      4,641       75.46       98.55
          T |         89        1.45      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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