Frequencies for first 10,000 rows of nofu variable in nhamcsed2011 dataset :

  No follow |
 up planned |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,445       94.45       94.45
        Yes |        555        5.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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