Frequencies for d_4_ipf_c11_9201 variable in prds_hosp10_yr2012 dataset :

d_4_ipf_c11 |
      _9201 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.03        0.03
          3 |          1        0.02        0.05
          7 |          1        0.02        0.06
       1490 |          1        0.02        0.08
          . |      6,222       99.92      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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