Frequencies for first 10,000 rows of uca_downs variable in natlterr2014 dataset

       Down |
 Syndrome 1 |
    Anomaly |
   reported |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          6        0.06        0.06
          2 |      8,807       88.07       88.13
          9 |      1,187       11.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016