Frequencies for first 10,000 rows of bwtr12 variable in natlterr2009 dataset :

      Birth |
     Weight |
  Recode 12 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          7        0.07        0.07
          2 |         60        0.60        0.67
          3 |         69        0.69        1.36
          4 |        176        1.76        3.12
          5 |        781        7.81       10.93
          6 |      2,705       27.05       37.98
          7 |      4,006       40.06       78.04
          8 |      1,754       17.54       95.58
          9 |        359        3.59       99.17
         10 |         62        0.62       99.79
         11 |          7        0.07       99.86
         12 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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