Frequencies for d_4_irf_c13_50 variable in prds_hosp10_yr2012 dataset :

d_4_irf_c13 |
        _50 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.02        0.02
          3 |          1        0.02        0.03
          . |      6,225       99.97      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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