Frequencies for a8_c2_31 variable in hosp_rollup2552_96_2011 dataset :

   a8_c2_31 |      Freq.     Percent        Cum.
------------+-----------------------------------
     -17077 |          1        3.45        3.45
      70802 |          2        6.90       10.34
     448110 |          1        3.45       13.79
     721776 |          1        3.45       17.24
          . |         24       82.76      100.00
------------+-----------------------------------
      Total |         29      100.00

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