Frequencies for first 10,000 rows of pastfl variable in namcs2012 dataset :

        Was |
   variable |
   imputed: |
  number of |
past visits |
 in last 12 |
     months |      Freq.     Percent        Cum.
------------+-----------------------------------
Not imputed |      9,224       92.24       92.24
    Imputed |        776        7.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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