Frequencies for first 10,000 rows of timemdfl variable in namcs2006 dataset :

 time spent |
       with |
  physician |
   imputed? |      Freq.     Percent        Cum.
------------+-----------------------------------
not imputed |      7,752       77.52       77.52
    imputed |      2,248       22.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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