Frequencies for d3_irf_c3_96 variable in prds_hosp10_yr2012 dataset :

d3_irf_c3_9 |
          6 |      Freq.     Percent        Cum.
------------+-----------------------------------
       1715 |          1        0.02        0.02
       2493 |          1        0.02        0.03
      12478 |          1        0.02        0.05
          . |      6,224       99.95      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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