Frequencies for first 10,000 rows of dmeth_rec variable in natl2009 dataset :

   Delivery |
     Method |
 Recode U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,772       67.72       67.72
          2 |      3,172       31.72       99.44
          9 |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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