Frequencies for first 10,000 rows of ca_hypo variable in natlterr2012 dataset :

Hypospadias |
        RFP |
646=f_ca_hy |
      pos R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,163       11.63       11.63
          N |      8,397       83.97       95.60
          U |        438        4.38       99.98
          Y |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016