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

  When orders for |
    lab tests are |
        submitted |
  electronically, |
    submitted by: |
          unknown |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Not applicable |      5,394       53.94       53.94
Box is not marked |      4,572       45.72       99.66
    Box is marked |         34        0.34      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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