Frequencies for first 10,000 rows of nofu variable in nhamcsed2002 dataset :

no followup |
    planned |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,144       91.44       91.44
          1 |        856        8.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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