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

   if yes, how |
     many past |
visits in last |
    12 months? |      Freq.     Percent        Cum.
---------------+-----------------------------------
          none |        579        5.79        5.79
           1-2 |      3,064       30.64       36.43
           3-5 |      2,961       29.61       66.04
     6 or more |      2,323       23.23       89.27
not applicable |      1,073       10.73      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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