The underground train systems of 5 cities

This table compares the underground train systems of 5 cities: London, Paris, Tokyo, Kyoto and Boston. There are three categories: year opened length and number of passenger in 2010.
The first underground opened in London in 1863, and the most recent underground opened in Boston in 2001. London also has the longest underground train system at 394 kilometers. Contrastingly, Kyoto has the shortest at 11 kilometers. Most significantly, Paris and Tokyo had the greatest number of passengers in 2010 at 189 and 192 million, respectively. The other three cities, London, Kyoto and Boston, had far fewer passengers in 2010 at 77, 45 and 50 million, respectively.
Overall, there is a huge difference in numbers in all three categories between the five cities compared. Kyoto was consistent with having both the shortest length and the fewest passengers.