Frequencies for first 10,000 rows of nofu variable in nhamcsed2015 dataset :

  No follow |
 up planned |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,000       90.00       90.00
        Yes |      1,000       10.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017