Frequencies for a_c1_89 variable in prds_hosp10_yr2011 dataset :

    a_c1_89 |      Freq.     Percent        Cum.
------------+-----------------------------------
     413391 |          1        0.02        0.02
     869833 |          1        0.02        0.03
    2258415 |          1        0.02        0.05
   2.98e+07 |          1        0.02        0.07
          . |      6,146       99.93      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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