Frequencies for a_c1_9910 variable in prds_hosp10_yr2015 dataset :

  a_c1_9910 |      Freq.     Percent        Cum.
------------+-----------------------------------
     446535 |          1        0.02        0.02
     598985 |          1        0.02        0.03
     706944 |          1        0.02        0.05
          . |      6,255       99.95      100.00
------------+-----------------------------------
      Total |      6,258      100.00

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