Frequencies for first 10,000 rows of nofu variable in nhamcsed2012 dataset :

  No follow |
 up planned |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,032       90.32       90.32
        Yes |        968        9.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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