Frequencies for first 10,000 rows of bwtr12 variable in natl2015 dataset :

      Birth |
     Weight |
  Recode 12 |
  01 0227 - |
 0499 grams |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          7        0.07        0.07
          2 |         42        0.42        0.49
          3 |         40        0.40        0.89
          4 |        106        1.06        1.95
          5 |        369        3.69        5.64
          6 |      1,370       13.70       19.34
          7 |      3,611       36.11       55.45
          8 |      3,161       31.61       87.06
          9 |      1,086       10.86       97.92
         10 |        188        1.88       99.80
         11 |         17        0.17       99.97
         12 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016