Frequencies for first 10,000 rows of nofu variable in nhamcsed2004 dataset :

no followup |
    planned |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,314       93.14       93.14
        yes |        686        6.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016