Frequencies for first 10,000 rows of lab variable in namcs1999 dataset :

     is lab |
    testing |
  performed |
     in the |
    office? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      6,302       63.02       63.02
        Yes |      3,698       36.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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