Frequencies for first 10,000 rows of exciprov variable in namcs2013 dataset :

   Excision of |
        tissue |
      provided |      Freq.     Percent        Cum.
---------------+-----------------------------------
         Blank |        108        1.08        1.08
Not applicable |      9,840       98.40       99.48
           Yes |         49        0.49       99.97
            No |          3        0.03      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017