Frequencies for first 10,000 rows of eresulte variable in nhamcsed2009 dataset :

    does ed |
       have |
computerize |
   d system |
for viewing |
     of lab |
   results? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |         81        0.81        0.81
          1 |      9,518       95.18       95.99
          2 |        401        4.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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