Frequencies for first 10,000 rows of labres3 variable in namcs2012 dataset :

Share lab results |
   electronically |
  (not fax) with: |
   hospitals with |
 which you are no |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Not applicable |      6,561       65.61       65.61
Box is not marked |      2,996       29.96       95.57
    Box is marked |        443        4.43      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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