Frequencies for first 10,000 rows of initvis variable in nhamcsed2006 dataset :

    imputed |
    initial |
  visit for |
    problem |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      1,057       10.57       10.57
        yes |      8,943       89.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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