Frequencies for first 10,000 rows of rail variable in accident dataset : RAIL XING | ID | Freq. Percent Cum. ------------+----------------------------------- 0000000 | 9,925 99.25 99.25 026148G | 1 0.01 99.26 026509J | 1 0.01 99.27 027226P | 1 0.01 99.28 027996L | 1 0.01 99.29 028310B | 1 0.01 99.30 028345C | 1 0.01 99.31 028395F | 1 0.01 99.32 028432F | 1 0.01 99.33 029930T | 1 0.01 99.34 057185U | 1 0.01 99.35 057190R | 1 0.01 99.36 057193L | 1 0.01 99.37 057247P | 1 0.01 99.38 1733 | 1 0.01 99.39 245024S | 1 0.01 99.40 253613C | 1 0.01 99.41 272218U | 1 0.01 99.42 339821V | 1 0.01 99.43 351459B | 1 0.01 99.44 433736L | 1 0.01 99.45 433815X | 1 0.01 99.46 4343324 | 1 0.01 99.47 434363T | 1 0.01 99.48 516120U | 1 0.01 99.49 600636S | 1 0.01 99.50 600698P | 1 0.01 99.51 624216f | 1 0.01 99.52 624413B | 1 0.01 99.53 624438P | 1 0.01 99.54 624769C | 1 0.01 99.55 625646U | 1 0.01 99.56 626311j | 1 0.01 99.57 626401G | 1 0.01 99.58 626676P | 1 0.01 99.59 627505S | 1 0.01 99.60 628414P | 1 0.01 99.61 631210G | 1 0.01 99.62 665186D | 1 0.01 99.63 665979E | 1 0.01 99.64 667512L | 1 0.01 99.65 667974C | 1 0.01 99.66 718472J | 1 0.01 99.67 723019P | 1 0.01 99.68 723202V | 1 0.01 99.69 723556P | 1 0.01 99.70 725431W | 1 0.01 99.71 728013R | 1 0.01 99.72 728161K | 1 0.01 99.73 731790B | 1 0.01 99.74 738155H | 1 0.01 99.75 742117G | 1 0.01 99.76 742390N | 1 0.01 99.77 746889F | 1 0.01 99.78 747685X | 2 0.02 99.80 752778C | 1 0.01 99.81 787734B | 1 0.01 99.82 787757H | 1 0.01 99.83 789151W | 1 0.01 99.84 789701V | 1 0.01 99.85 790849Y | 1 0.01 99.86 804347G | 1 0.01 99.87 810848A | 1 0.01 99.88 810979D | 1 0.01 99.89 811005Y | 1 0.01 99.90 833644D | 1 0.01 99.91 833756C | 1 0.01 99.92 834003A | 1 0.01 99.93 834040C | 1 0.01 99.94 834048G | 1 0.01 99.95 868341T | 1 0.01 99.96 945571D | 1 0.01 99.97 9999999 | 3 0.03 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016