Frequencies for first 10,000 rows of dmeth_rec variable in natl2007 dataset :

   Delivery |
     Method |
 Recode U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,725       77.25       77.25
          2 |      2,216       22.16       99.41
          9 |         59        0.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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