Frequencies for first 10,000 rows of lab variable in namcs2004 dataset :

     is lab |
    testing |
  performed |
 at office? |      Freq.     Percent        Cum.
------------+-----------------------------------
        Yes |      4,224       42.24       42.24
         No |      5,776       57.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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