Frequencies for d_4_ipf_c11_75 variable in prds_hosp10_yr2011 dataset :

d_4_ipf_c11 |
        _75 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.02        0.02
          2 |          1        0.02        0.03
       1138 |          1        0.02        0.05
          . |      6,147       99.95      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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