Frequencies for d3_irf_c3_98 variable in prds_hosp10_yr2010 dataset :

d3_irf_c3_9 |
          8 |      Freq.     Percent        Cum.
------------+-----------------------------------
       2047 |          1        0.04        0.04
       3916 |          1        0.04        0.09
       9018 |          1        0.04        0.13
      18206 |          1        0.04        0.17
          . |      2,319       99.83      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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