Frequencies for first 10,000 rows of wgtcd_tr variable in person dataset :

     Weight |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         31        0.31        0.31
          1 |        669        6.69        7.00
          2 |        261        2.61        9.61
          4 |          9        0.09        9.70
          5 |         15        0.15        9.85
          6 |         37        0.37       10.22
          7 |          6        0.06       10.28
          8 |         18        0.18       10.46
          9 |      4,672       46.72       57.18
          . |      4,282       42.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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