Frequencies for first 10,000 rows of ereminde variable in nhamcsed2007 dataset :

  does ed have |
  computerized |
    system for |
 reminders for |
interven/scree |
   ning tests? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        396        3.96        3.96
       unknown |        974        9.74       13.70
           yes |      4,179       41.79       55.49
            no |      4,451       44.51      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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