Frequencies for first 10,000 rows of emropd variable in nhamcsopd2005 dataset :

       does outpatient dept have |
      electronic patient medical |
                        records? |      Freq.     Percent        Cum.
---------------------------------+-----------------------------------
             yes, all electronic |      1,801       18.01       18.01
yes, part paper, part electronic |      3,676       36.76       54.77
                              no |      4,263       42.63       97.40
                         unknown |        260        2.60      100.00
---------------------------------+-----------------------------------
                           Total |     10,000      100.00

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