Frequencies for first 10,000 rows of excision variable in namcs2012 dataset :

Excision of |
     tissue |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,799       97.99       97.99
        Yes |        201        2.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016