annual ridership (2012)  rider per mile  opened  stations  lines
0                2544892400           37613    1904       468     24
1                 280904200            9227    1976        86      5
2                 231154300            7095    1892       145      8
3                 165028800           13982    1897        53      3
4                 123219300            4056    1972        44      5
5                  98171300            9172    1907        74      3
6                  70548400           18123    1908        13      4
7                  70506800            4594    1979        38      4
8                  48703700            9115    1993        16      2
9                  19242800            2904    1984        23      2
10                 15399400            3871    1983        14      1
11                 11023500            3794    2004        16      1
12                 10619900            2606    1936        13      1
13                  6239900             881    1955        18      1
14                  4445100            1071    1860        22      1

Table as JSON:
{"annual ridership (2012)":{"0":2544892400,"1":280904200,"2":231154300,"3":165028800,"4":123219300,"5":98171300,"6":70548400,"7":70506800,"8":48703700,"9":19242800,"10":15399400,"11":11023500,"12":10619900,"13":6239900,"14":4445100},"rider per mile":{"0":37613,"1":9227,"2":7095,"3":13982,"4":4056,"5":9172,"6":18123,"7":4594,"8":9115,"9":2904,"10":3871,"11":3794,"12":2606,"13":881,"14":1071},"opened":{"0":1904,"1":1976,"2":1892,"3":1897,"4":1972,"5":1907,"6":1908,"7":1979,"8":1993,"9":1984,"10":1983,"11":2004,"12":1936,"13":1955,"14":1860},"stations":{"0":468,"1":86,"2":145,"3":53,"4":44,"5":74,"6":13,"7":38,"8":16,"9":23,"10":14,"11":16,"12":13,"13":18,"14":22},"lines":{"0":24,"1":5,"2":8,"3":3,"4":5,"5":3,"6":4,"7":4,"8":2,"9":2,"10":1,"11":1,"12":1,"13":1,"14":1}}