Frequencies for first 10,000 rows of anesthe variable in natlterr2002 dataset :

 Anesthetic |
complicatio |
         ns |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.02        0.02
          2 |      9,976       99.76       99.78
          8 |         14        0.14       99.92
          9 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015