Frequencies for first 10,000 rows of birwt4 variable in natlterr1997 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        136        1.36        1.36
          2 |        888        8.88       10.24
          3 |      8,973       89.73       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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