Frequencies for b_1_c23_55 variable in hosp_rollup2552_96_2010 dataset :

 b_1_c23_55 |      Freq.     Percent        Cum.
------------+-----------------------------------
        621 |          1        0.02        0.02
        642 |          1        0.02        0.05
       9512 |          1        0.02        0.07
          . |      4,002       99.93      100.00
------------+-----------------------------------
      Total |      4,005      100.00

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