Frequencies for trim variable in drg1988 dataset :

       Trim |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          5        1.05        1.05
         20 |          1        0.21        1.26
         30 |          3        0.63        1.89
         40 |          2        0.42        2.31
         50 |          7        1.47        3.77
         60 |          4        0.84        4.61
         70 |          9        1.89        6.50
         80 |          9        1.89        8.39
         90 |         13        2.73       11.11
        100 |          5        1.05       12.16
        110 |         14        2.94       15.09
        120 |         11        2.31       17.40
        130 |         16        3.35       20.75
        140 |         22        4.61       25.37
        150 |         14        2.94       28.30
        160 |         10        2.10       30.40
        170 |         15        3.14       33.54
        180 |         15        3.14       36.69
        190 |         18        3.77       40.46
        200 |         15        3.14       43.61
        210 |         19        3.98       47.59
        220 |         36        7.55       55.14
        230 |         36        7.55       62.68
        240 |         39        8.18       70.86
        250 |         37        7.76       78.62
        260 |         16        3.35       81.97
        270 |         18        3.77       85.74
        280 |         11        2.31       88.05
        290 |         11        2.31       90.36
        300 |          9        1.89       92.24
        310 |         13        2.73       94.97
        320 |          9        1.89       96.86
        330 |          3        0.63       97.48
        340 |          2        0.42       97.90
        350 |          5        1.05       98.95
        360 |          3        0.63       99.58
        440 |          1        0.21       99.79
        510 |          1        0.21      100.00
------------+-----------------------------------
      Total |        477      100.00

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