Frequencies for first 10,000 rows of ca_hypo variable in natlterr2014 dataset :

Hypospadias |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          N |      8,808       88.08       98.85
          U |        110        1.10       99.95
          Y |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016