Frequencies for rownumber variable in busrules2014 dataset :

 Row Number |      Freq.     Percent        Cum.
------------+-----------------------------------
         10 |        592       28.15       28.15
         11 |        220       10.46       38.61
         12 |        185        8.80       47.41
         13 |        153        7.28       54.68
         14 |        151        7.18       61.86
         15 |        145        6.89       68.76
         16 |        134        6.37       75.13
         17 |         84        3.99       79.13
         18 |         83        3.95       83.07
         19 |         56        2.66       85.73
         20 |         53        2.52       88.25
         21 |         49        2.33       90.58
         22 |         48        2.28       92.87
         23 |         20        0.95       93.82
         24 |         18        0.86       94.67
         25 |         16        0.76       95.44
         26 |         17        0.81       96.24
         27 |          8        0.38       96.62
         28 |          8        0.38       97.00
         29 |          6        0.29       97.29
         30 |          5        0.24       97.53
         31 |          3        0.14       97.67
         32 |          3        0.14       97.81
         33 |          3        0.14       97.96
         34 |          3        0.14       98.10
         35 |          3        0.14       98.24
         36 |          3        0.14       98.38
         37 |          3        0.14       98.53
         38 |          4        0.19       98.72
         39 |          4        0.19       98.91
         40 |          4        0.19       99.10
         41 |          3        0.14       99.24
         42 |          3        0.14       99.38
         43 |          3        0.14       99.52
         44 |          3        0.14       99.67
         45 |          3        0.14       99.81
         46 |          3        0.14       99.95
         49 |          1        0.05      100.00
------------+-----------------------------------
      Total |      2,103      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016