Frequencies for first 10,000 rows of pastvis variable in namcs2002 dataset :

 How many past |
visits in last |
    12 months? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         Blank |        390        3.90        3.90
          none |        603        6.03        9.93
           1-2 |      2,740       27.40       37.33
           3-5 |      2,426       24.26       61.59
     6 or more |      2,164       21.64       83.23
       Unknown |        167        1.67       84.90
Not applicable |      1,510       15.10      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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