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

   does emr |
     system |
    include |
       test |
   results? |      Freq.     Percent        Cum.
------------+-----------------------------------
        yes |      4,747       47.47       47.47
         no |        514        5.14       52.61
    unknown |        186        1.86       54.47
      blank |      4,553       45.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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