Frequencies for ehrwho7r variable in namcsphys2005_2010 dataset :

  if orders |
        for |
prescriptio |
     ns/lab |
  tests are |
  submitted |
electronica |
   lly, who |
   submits  |      Freq.     Percent        Cum.
------------+-----------------------------------
         -7 |        543        7.29        7.29
         -6 |      6,161       82.71       90.00
          0 |        662        8.89       98.89
          1 |         83        1.11      100.00
------------+-----------------------------------
      Total |      7,449      100.00

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