Frequencies for a7_3_c5_4 variable in hosp_rollup2552_96_2011 dataset :

  a7_3_c5_4 |      Freq.     Percent        Cum.
------------+-----------------------------------
       1596 |          1        3.45        3.45
       1611 |          1        3.45        6.90
       1854 |          1        3.45       10.34
      33228 |          2        6.90       17.24
          . |         24       82.76      100.00
------------+-----------------------------------
      Total |         29      100.00

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