Frequencies for first 10,000 rows of nofu variable in nhamcsed2013 dataset :

  No follow |
 up planned |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,001       90.01       90.01
        Yes |        999        9.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016