Frequencies for first 10,000 rows of ewhorefl variable in namcs2012 dataset :

  When orders for |
    lab tests are |
        submitted |
  electronically, |
    submitted by: |
       refused to |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Not applicable |      5,394       53.94       53.94
Box is not marked |      4,606       46.06      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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