Frequencies for first 10,000 rows of birwt4 variable in natl1999 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        186        1.86        1.86
          2 |        714        7.14        9.00
          3 |      9,095       90.95       99.95
          4 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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