Frequencies for first 10,000 rows of uca_other variable in natl2006 dataset :

      Other |
 Congenital |
  Anomalies |
        RFP |
773=f_uca_o |
   thrcon U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         47        0.47        0.47
          2 |      9,805       98.05       98.52
          9 |        148        1.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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