Frequencies for first 10,000 rows of bwtr12 variable in natl2010 dataset :

      Birth |
     Weight |
  Recode 12 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          3        0.03        0.03
          2 |         26        0.26        0.29
          3 |         58        0.58        0.87
          4 |        103        1.03        1.90
          5 |        373        3.73        5.63
          6 |      1,332       13.32       18.95
          7 |      3,535       35.35       54.30
          8 |      3,270       32.70       87.00
          9 |      1,082       10.82       97.82
         10 |        191        1.91       99.73
         11 |         16        0.16       99.89
         12 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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