The table below gives information about the underground railway systems in six cities.

The graph compares the different underground railway systems from six cities all around the world.

Overall

, we can notice that each system has a particular opening date and a precise sum of kilometres of route.

By contrast

, the passengers who pass through these railway structures each year depend a lot on each city.

Firstly

, we can see that the soonest underground railway was opened in 1863 in London

while

in Los Angeles the most recent was inaugurated in 2001. If we look closer at the dates, we can notice that practically all of them are from the end of the 21st century.

Furthermore

, the system with the most kilometres of route is London again with 394 and Kyoto has the least distance with only 11 kilometres.

Secondly

, when we pay attention to the statistics on the passengers per year, we can see that there is a considerable difference between countries.

While

Paris has the highest number of users with 1927 million, Kyoto has the lowest number on the table with only 45 million.

However

, we can notice that other countries

also

have an enormous number of passengers like Tokyo, Washington DC or even London.