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

Hepatitis C |
600=f_ip_he |
     patc R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,726       97.26       97.26
          U |        222        2.22       99.48
          Y |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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