Frequencies for first 10,000 rows of emropd variable in nhamcsopd2006 dataset :

       does |
 outpatient |
   dept use |
 electronic |
    medical |
   records? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         22        0.22        0.22
          1 |        691        6.91        7.13
          2 |      3,758       37.58       44.71
          3 |      5,133       51.33       96.04
          4 |        396        3.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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