Frequencies for first 10,000 rows of birwt4 variable in natlterr1999 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        122        1.22        1.22
          2 |        935        9.35       10.57
          3 |      8,938       89.38       99.95
          4 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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