Frequencies for first 10,000 rows of bwtr12 variable in natlterr2011 dataset :

      Birth |
     Weight |
  Recode 12 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         13        0.13        0.13
          2 |         42        0.42        0.55
          3 |         62        0.62        1.17
          4 |        154        1.54        2.71
          5 |        698        6.98        9.69
          6 |      2,505       25.05       34.74
          7 |      4,015       40.15       74.89
          8 |      1,988       19.88       94.77
          9 |        399        3.99       98.76
         10 |         54        0.54       99.30
         11 |         22        0.22       99.52
         12 |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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