Frequencies for first 10,000 rows of ecpoe variable in namcs2009 dataset :

  practice has |
  computerized |
    system for |
    orders for |
     prescrip? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        128        1.28        1.28
       unknown |         45        0.45        1.73
           yes |      4,984       49.84       51.57
            no |      4,795       47.95       99.52
    turned off |         48        0.48      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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