Frequencies for first 10,000 rows of pub13x variable in h84 dataset :

 PID COV BY |
 PUBLIC INS |
   - EDITED |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,316       33.16       33.16
          2 |      6,684       66.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018