Frequencies for first 10,000 rows of bwtr12 variable in natl2013 dataset :

      Birth |
     Weight |
  Recode 12 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.10        0.10
          2 |         25        0.25        0.35
          3 |         43        0.43        0.78
          4 |        108        1.08        1.86
          5 |        358        3.58        5.44
          6 |      1,357       13.57       19.01
          7 |      3,680       36.80       55.81
          8 |      3,119       31.19       87.00
          9 |      1,055       10.55       97.55
         10 |        214        2.14       99.69
         11 |         27        0.27       99.96
         12 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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