Frequencies for first 10,000 rows of bwtr12 variable in natlterr2005 dataset :

      Birth |
     Weight |
  Recode 12 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          8        0.08        0.08
          2 |         34        0.34        0.42
          3 |         72        0.72        1.14
          4 |        154        1.54        2.68
          5 |        647        6.47        9.15
          6 |      2,287       22.87       32.02
          7 |      3,944       39.44       71.46
          8 |      2,190       21.90       93.36
          9 |        525        5.25       98.61
         10 |         90        0.90       99.51
         11 |         16        0.16       99.67
         12 |         33        0.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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