Frequencies for first 10,000 rows of vworkrel variable in nhamcsed2003 dataset :

    is this |
 visit work |
   related? |      Freq.     Percent        Cum.
------------+-----------------------------------
      blank |        235        2.35        2.35
        yes |        314        3.14        5.49
         no |      8,944       89.44       94.93
    unknown |        507        5.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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