Frequencies for first 10,000 rows of nofu variable in nhamcsed2014 dataset :

  No follow |
 up planned |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,997       89.97       89.97
        Yes |      1,003       10.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017