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

     Weight |
 Code-Truck |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         33        0.33        0.33
          1 |      1,068       10.68       11.01
          2 |        436        4.36       15.37
          3 |         12        0.12       15.49
          4 |          3        0.03       15.52
          5 |         16        0.16       15.68
          6 |         58        0.58       16.26
          7 |         10        0.10       16.36
          8 |        100        1.00       17.36
          9 |      3,722       37.22       54.58
          . |      4,542       45.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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