Frequencies for first 10,000 rows of rail variable in accident dataset : Rail Grade | Xing ID | Freq. Percent Cum. ------------+----------------------------------- 0000000 | 9,737 97.37 97.37 003395J | 1 0.01 97.38 003401K | 1 0.01 97.39 003640K | 1 0.01 97.40 0036468 | 1 0.01 97.41 025260P | 1 0.01 97.42 026067G | 1 0.01 97.43 026175D | 1 0.01 97.44 026207G | 1 0.01 97.45 026237Y | 1 0.01 97.46 026788G | 1 0.01 97.47 027226P | 1 0.01 97.48 027372V | 1 0.01 97.49 028856M | 1 0.01 97.50 029041P | 1 0.01 97.51 029165H | 1 0.01 97.52 029254A | 1 0.01 97.53 253059N | 1 0.01 97.54 253068M | 1 0.01 97.55 253604D | 1 0.01 97.56 272319F | 1 0.01 97.57 272540V | 1 0.01 97.58 272544X | 1 0.01 97.59 272576D | 1 0.01 97.60 272752Y | 1 0.01 97.61 330354E | 1 0.01 97.62 339694E | 1 0.01 97.63 425914A | 1 0.01 97.64 426246C | 1 0.01 97.65 433819A | 1 0.01 97.66 433820U | 1 0.01 97.67 434981T | 1 0.01 97.68 437745Y | 1 0.01 97.69 438495S | 1 0.01 97.70 438631T | 1 0.01 97.71 620896P | 1 0.01 97.72 6212875 | 1 0.01 97.73 623109M | 1 0.01 97.74 623491C | 1 0.01 97.75 624174W | 1 0.01 97.76 624957S | 1 0.01 97.77 637997C | 1 0.01 97.78 664077W | 1 0.01 97.79 667115N | 1 0.01 97.80 667456G | 1 0.01 97.81 6Z8070D | 1 0.01 97.82 725283E | 1 0.01 97.83 725401E | 1 0.01 97.84 727568X | 1 0.01 97.85 727684L | 1 0.01 97.86 727828N | 1 0.01 97.87 728292N | 1 0.01 97.88 731812Y | 1 0.01 97.89 741823N | 1 0.01 97.90 746904F | 1 0.01 97.91 746970T | 1 0.01 97.92 749105L | 1 0.01 97.93 749596M | 1 0.01 97.94 749658H | 1 0.01 97.95 752799V | 1 0.01 97.96 755176W | 1 0.01 97.97 760607W | 1 0.01 97.98 760808M | 1 0.01 97.99 760857J | 1 0.01 98.00 778167B | 1 0.01 98.01 787489A | 1 0.01 98.02 787790H | 1 0.01 98.03 789018S | 1 0.01 98.04 790829M | 1 0.01 98.05 805305Y | 1 0.01 98.06 811008U | 1 0.01 98.07 811087H | 1 0.01 98.08 811089W | 1 0.01 98.09 811095A | 1 0.01 98.10 811098V | 1 0.01 98.11 833919J | 1 0.01 98.12 833992G | 1 0.01 98.13 834178D | 1 0.01 98.14 9999999 | 186 1.86 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 22 Apr 2016