Frequencies for first 10,000 rows of anesthe variable in natl1990 dataset :

 Anesthetic |
complicatio |
         ns |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          3        0.03        0.03
          2 |      9,929       99.29       99.32
          8 |          2        0.02       99.34
          9 |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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