Frequencies for a_c1_9910 variable in prds_hosp10_yr2013 dataset :

  a_c1_9910 |      Freq.     Percent        Cum.
------------+-----------------------------------
     423589 |          1        0.02        0.02
     579180 |          1        0.02        0.03
     597756 |          1        0.02        0.05
          . |      6,245       99.95      100.00
------------+-----------------------------------
      Total |      6,248      100.00

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