Frequencies for first 10,000 rows of ip_hepatc variable in natlterr2015 dataset :

Hepatitis C |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,809       88.09       98.87
          U |        107        1.07       99.94
          Y |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016