Frequencies for a_c1_96 variable in hosp_rollup2552_96_2011 dataset :

    a_c1_96 |      Freq.     Percent        Cum.
------------+-----------------------------------
       2628 |          1        3.45        3.45
      25159 |          1        3.45        6.90
      41697 |          1        3.45       10.34
     499964 |          1        3.45       13.79
          . |         25       86.21      100.00
------------+-----------------------------------
      Total |         29      100.00

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