Frequencies for wgtcd_tr variable in person dataset :

     Weight |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.15        0.15
          1 |         15        1.13        1.29
          2 |         26        1.97        3.25
          6 |          3        0.23        3.48
          8 |          1        0.08        3.56
          9 |      1,149       86.91       90.47
          . |        126        9.53      100.00
------------+-----------------------------------
      Total |      1,322      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016