Frequencies for a_c1_69 variable in hosp_rollup2552_96_2010 dataset :

    a_c1_69 |      Freq.     Percent        Cum.
------------+-----------------------------------
     563785 |          1        0.02        0.02
     765777 |          2        0.05        0.07
          . |      4,002       99.93      100.00
------------+-----------------------------------
      Total |      4,005      100.00

by Jean Roth , jroth@nber.org , 21 Apr 2018