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

    does ed |
       have |
computerize |
   d system |
 for orders |
        for |
prescriptio |
        ns? |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |         81        0.81        0.81
          1 |      6,837       68.37       69.18
          2 |      3,082       30.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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