Frequencies for first 10,000 rows of birwt4 variable in natlterr1998 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        145        1.45        1.45
          2 |        905        9.05       10.50
          3 |      8,949       89.49       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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