Frequencies for first 10,000 rows of bwtr12 variable in natl2017 dataset :

      Birth |
     Weight |
  Recode 12 |
  01 0227 - |
 0499 grams |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         12        0.12        0.12
          2 |         31        0.31        0.43
          3 |         51        0.51        0.94
          4 |        127        1.27        2.21
          5 |        384        3.84        6.05
          6 |      1,392       13.92       19.97
          7 |      3,537       35.37       55.34
          8 |      3,169       31.69       87.03
          9 |      1,114       11.14       98.17
         10 |        165        1.65       99.82
         11 |         17        0.17       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018