A glance at the provided table reveals a number of differences among some major metro systems over the world (London, Paris, Tokyo, Washington DC, Kyoto, Los Angeles) including the year of establishment, total route length, passenger volume.
One particularly interesting fact highlighted by the figure is that the more recently established metro systems are considerably shorter than the older ones. Besides, the annual carrying capacity mentioned vary greatly.
As can be seen from the chart, London metro system is not only the oldest ones but also the most extensive, covering roughly 1100 km. Inaugurated in 1890, Paris underground ranked second in both age and extent, which is 594 km in length. In stark contrast, Kyoto and Los Angeles metro system, which were established in 1980 and 2001 respectively, were far shorter. The former covered 11 km and the latter just 14 km.
In terms of passenger volume, Tokyo outstrips all its counterparts, handling approximately 1.4 billion customers. Paris follows at about 850 million, compared to London at 548 million. By comparison, the newer and shorter systems accommodate fewer people, exemplified by Washington DC that serves roughly 70 million.