Frequencies for first 10,000 rows of rail variable in accident dataset : RAIL XING | ID | Freq. Percent Cum. ------------+----------------------------------- 0000000 | 9,936 99.36 99.36 003289B | 1 0.01 99.37 00398A | 1 0.01 99.38 026516U | 1 0.01 99.39 026651M | 1 0.01 99.40 026742T | 1 0.01 99.41 028453Y | 1 0.01 99.42 028527N | 1 0.01 99.43 028582N | 1 0.01 99.44 028619B | 1 0.01 99.45 028733B | 1 0.01 99.46 029578C | 1 0.01 99.47 029709D | 1 0.01 99.48 057352R | 1 0.01 99.49 271997L | 1 0.01 99.50 272073K | 1 0.01 99.51 272118P | 1 0.01 99.52 272637S | 1 0.01 99.53 330450G | 1 0.01 99.54 330593E | 1 0.01 99.55 333820U | 1 0.01 99.56 34323 | 1 0.01 99.57 349964V | 1 0.01 99.58 352177N | 1 0.01 99.59 434356H | 1 0.01 99.60 437558R | 1 0.01 99.61 437919T | 1 0.01 99.62 437987V | 1 0.01 99.63 438243R | 1 0.01 99.64 500535E | 1 0.01 99.65 531602G | 1 0.01 99.66 600636S | 1 0.01 99.67 620992S | 1 0.01 99.68 621016L | 1 0.01 99.69 622318S | 1 0.01 99.70 622803A | 1 0.01 99.71 624572B | 2 0.02 99.73 624775F | 1 0.01 99.74 625087W | 1 0.01 99.75 664073U | 1 0.01 99.76 670509G | 1 0.01 99.77 7267507 | 1 0.01 99.78 726956T | 1 0.01 99.79 727112R | 1 0.01 99.80 7317866 | 1 0.01 99.81 7319684 | 1 0.01 99.82 741088V | 1 0.01 99.83 741349T | 1 0.01 99.84 745839Y | 1 0.01 99.85 746880U | 1 0.01 99.86 750703W | 1 0.01 99.87 750732G | 1 0.01 99.88 762131G | 1 0.01 99.89 787790H | 1 0.01 99.90 795911M | 1 0.01 99.91 804464C | 1 0.01 99.92 833920D | 1 0.01 99.93 859 | 1 0.01 99.94 9999999 | 5 0.05 99.99 999999A | 1 0.01 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016