Frequencies for e_a_hos_c1_1 variable in hosp_rollup2552_96_2011 dataset :

e_a_hos_c1_ |
          1 |      Freq.     Percent        Cum.
------------+-----------------------------------
      33274 |          1        3.45        3.45
    3649711 |          1        3.45        6.90
    6468640 |          2        6.90       13.79
    7377329 |          1        3.45       17.24
   1.07e+07 |          1        3.45       20.69
          . |         23       79.31      100.00
------------+-----------------------------------
      Total |         29      100.00

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