Frequencies for trim variable in drg2004 dataset :

       Trim |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        499       92.41       92.41
         40 |          2        0.37       92.78
         50 |          3        0.56       93.33
         60 |          1        0.19       93.52
         70 |          1        0.19       93.70
         90 |          2        0.37       94.07
        110 |          2        0.37       94.44
        130 |          1        0.19       94.63
        150 |          2        0.37       95.00
        170 |          3        0.56       95.56
        190 |          1        0.19       95.74
        200 |          2        0.37       96.11
        220 |          2        0.37       96.48
        230 |          1        0.19       96.67
        260 |          2        0.37       97.04
        270 |          4        0.74       97.78
        280 |          1        0.19       97.96
        290 |          4        0.74       98.70
        300 |          2        0.37       99.07
        330 |          2        0.37       99.44
        370 |          2        0.37       99.81
        420 |          1        0.19      100.00
------------+-----------------------------------
      Total |        540      100.00

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