Frequencies for first 10,000 rows of birwt3 variable in natl1983 dataset :

Birthweight |
   Recode 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        766        7.66        7.66
          2 |      9,229       92.29       99.95
          3 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016