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

      Fetal |
    Alcohol |
   Syndrome |
        RFP |
742=f_uab_a |
   lcosyn U |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |      9,860       98.60       98.60
          9 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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