Frequencies for a_c1_9910 variable in prds_hosp10_yr2017 dataset :

       CORF |
    A000000 |
      09910 |
      00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
     436477 |          1        0.03        0.03
     640459 |          1        0.03        0.05
          . |      3,747       99.95      100.00
------------+-----------------------------------
      Total |      3,749      100.00

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