Frequencies for first 10,000 rows of pastfl variable in namcs2013 dataset :

        Was |
   variable |
   imputed: |
  number of |
past visits |
 in last 12 |
     months |      Freq.     Percent        Cum.
------------+-----------------------------------
Not imputed |      9,257       92.57       92.57
    Imputed |        743        7.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017