Frequencies for first 10,000 rows of birwt4 variable in natlterr1996 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        112        1.12        1.12
          2 |        896        8.96       10.08
          3 |      8,988       89.88       99.96
          4 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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