Frequencies for a_c1_19 variable in hosp_rollup2552_96_2011 dataset :

    a_c1_19 |      Freq.     Percent        Cum.
------------+-----------------------------------
      17786 |          1        3.45        3.45
     319050 |          1        3.45        6.90
          . |         27       93.10      100.00
------------+-----------------------------------
      Total |         29      100.00

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