Frequencies for d_4_irf_c13_90 variable in prds_hosp10_yr2011 dataset :

d_4_irf_c13 |
        _90 |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          1        0.02        0.02
        460 |          1        0.02        0.03
          . |      6,148       99.97      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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