Frequencies for first 10,000 rows of ca_hypo variable in natl2013 dataset :

Hypospadias |
        RFP |
646=f_ca_hy |
      pos R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,992       99.92       99.92
          Y |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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