Frequencies for first 10,000 rows of rownumber variable in bencs2015 dataset :

 Row Number |      Freq.     Percent        Cum.
------------+-----------------------------------
         61 |        121        1.21        1.21
         62 |        121        1.21        2.42
         63 |        121        1.21        3.63
         64 |        121        1.21        4.84
         65 |        121        1.21        6.05
         66 |        122        1.22        7.27
         67 |        121        1.21        8.48
         68 |        212        2.12       10.60
         69 |        122        1.22       11.82
         70 |        121        1.21       13.03
         71 |        121        1.21       14.24
         72 |        121        1.21       15.45
         73 |        121        1.21       16.66
         74 |        122        1.22       17.88
         75 |        122        1.22       19.10
         76 |        122        1.22       20.32
         77 |        122        1.22       21.54
         78 |        121        1.21       22.75
         79 |        122        1.22       23.97
         80 |        122        1.22       25.19
         81 |        121        1.21       26.40
         82 |        121        1.21       27.61
         83 |        122        1.22       28.83
         84 |        121        1.21       30.04
         85 |        121        1.21       31.25
         86 |        121        1.21       32.46
         87 |        121        1.21       33.67
         88 |        122        1.22       34.89
         89 |        121        1.21       36.10
         90 |        121        1.21       37.31
         91 |        121        1.21       38.52
         92 |        121        1.21       39.73
         93 |        122        1.22       40.95
         94 |        122        1.22       42.17
         95 |        122        1.22       43.39
         96 |        122        1.22       44.61
         97 |        122        1.22       45.83
         98 |        121        1.21       47.04
         99 |        121        1.21       48.25
        100 |        122        1.22       49.47
        101 |        121        1.21       50.68
        102 |        121        1.21       51.89
        103 |        122        1.22       53.11
        104 |        213        2.13       55.24
        105 |        121        1.21       56.45
        106 |        121        1.21       57.66
        107 |        121        1.21       58.87
        108 |        121        1.21       60.08
        109 |        121        1.21       61.29
        110 |        213        2.13       63.42
        111 |        212        2.12       65.54
        112 |        213        2.13       67.67
        113 |        213        2.13       69.80
        114 |        213        2.13       71.93
        115 |        213        2.13       74.06
        116 |        122        1.22       75.28
        117 |        121        1.21       76.49
        118 |        213        2.13       78.62
        119 |        137        1.37       79.99
        120 |        127        1.27       81.26
        121 |        128        1.28       82.54
        122 |        127        1.27       83.81
        123 |        124        1.24       85.05
        124 |        123        1.23       86.28
        125 |        124        1.24       87.52
        126 |        123        1.23       88.75
        127 |        123        1.23       89.98
        128 |        123        1.23       91.21
        129 |        124        1.24       92.45
        130 |        123        1.23       93.68
        131 |        124        1.24       94.92
        132 |        124        1.24       96.16
        133 |        124        1.24       97.40
        134 |        123        1.23       98.63
        135 |        123        1.23       99.86
        136 |          2        0.02       99.88
        137 |          2        0.02       99.90
        138 |          2        0.02       99.92
        139 |          2        0.02       99.94
        140 |          2        0.02       99.96
        141 |          2        0.02       99.98
        142 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Dec 2017