Frequencies for first 10,000 rows of pastfl variable in namcs2011 dataset :

  Number of |
past visits |
   imputed? |      Freq.     Percent        Cum.
------------+-----------------------------------
Not imputed |      9,125       91.25       91.25
    Imputed |        875        8.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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