Frequencies for first 10,000 rows of bwtr4 variable in natlterr2010 dataset :

      Birth |
     Weight |
   Recode 4 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        122        1.22        1.22
          2 |        757        7.57        8.79
          3 |      8,619       86.19       94.98
          4 |        502        5.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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