Frequencies for first 10,000 rows of lab variable in namcs2001 dataset :

     is lab |
    testing |
  performed |
 at office? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,763       37.63       37.63
          2 |      6,237       62.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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