Frequencies for first 10,000 rows of lab variable in namcs2000 dataset :

     is lab |
    testing |
  performed |
     in the |
    office? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      4,113       41.13       41.13
        Yes |      5,887       58.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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