Frequencies for d_4_ipf_c11_59 variable in prds_hosp10_yr2017 dataset :

    Cardiac |
Catheteriza |
       tion |
    D00B184 |
      05900 |
      01100 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.05        0.05
          9 |          1        0.03        0.08
        143 |          1        0.03        0.11
          . |      3,745       99.89      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 26 Oct 2018