Frequencies for trim variable in drg1987 dataset :

       Trim |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          8        1.68        1.68
         30 |          4        0.84        2.52
         40 |          5        1.05        3.56
         50 |          5        1.05        4.61
         60 |          4        0.84        5.45
         70 |          9        1.89        7.34
         80 |          6        1.26        8.60
         90 |          6        1.26        9.85
        100 |          7        1.47       11.32
        110 |         11        2.31       13.63
        120 |         12        2.52       16.14
        130 |          7        1.47       17.61
        140 |         18        3.77       21.38
        150 |         12        2.52       23.90
        160 |         22        4.61       28.51
        170 |         10        2.10       30.61
        180 |         20        4.19       34.80
        190 |         11        2.31       37.11
        200 |         15        3.14       40.25
        210 |         27        5.66       45.91
        220 |         61       12.79       58.70
        230 |         42        8.81       67.51
        240 |         32        6.71       74.21
        250 |         26        5.45       79.66
        260 |         12        2.52       82.18
        270 |         17        3.56       85.74
        280 |         12        2.52       88.26
        290 |          7        1.47       89.73
        300 |         15        3.14       92.87
        310 |          7        1.47       94.34
        320 |         10        2.10       96.44
        330 |          4        0.84       97.27
        340 |          3        0.63       97.90
        350 |          5        1.05       98.95
        360 |          1        0.21       99.16
        380 |          2        0.42       99.58
        390 |          1        0.21       99.79
        400 |          1        0.21      100.00
------------+-----------------------------------
      Total |        477      100.00

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