Frequencies for first 10,000 rows of bwimp variable in natl1996 dataset :

    Imputed |
Birthweight |      Freq.     Percent        Cum.
------------+-----------------------------------
        510 |          1        0.01        0.01
       1730 |          1        0.01        0.02
       2778 |          1        0.01        0.03
       3119 |          1        0.01        0.04
       3543 |          1        0.01        0.05
       3590 |          1        0.01        0.06
       9999 |          1        0.01        0.07
          . |      9,993       99.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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