Frequencies for a7_3_c11_2 variable in hosp_rollup2552_96_2011 dataset :

 a7_3_c11_2 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -1 |          1        3.45        3.45
          . |         28       96.55      100.00
------------+-----------------------------------
      Total |         29      100.00

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