Frequencies for first 10,000 rows of uca_cleftlp variable in natl2007 dataset :

      Cleft |
 Lip/Palate |
        RFP |
766=f_uca_c |
 leftlp U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          7        0.07        0.07
          2 |      9,096       90.96       91.03
          9 |        897        8.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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