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

  Gonorrhea |
595=f_ip_go |
      nor R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,747       97.47       97.47
          U |        222        2.22       99.69
          Y |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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