Frequencies for first 10,000 rows of ca_hypo variable in natl2016 dataset :

Hypospadias |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,984       99.84       99.84
          Y |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017