The table shows information about underground railway systems in six different cities. It compares when they opened, how long they are, and how many passengers use them every year.
Overall, it is clear that older systems are usually bigger and have more passengers. London, Paris and Tokyo are the oldest and most busy networks in the table.
London has the oldest system, it opened in 1863. It is the longest route with 394 kilometres. But Tokyo is most used system. It has 1927 million passengers every year, but the route is only 155 kilometres. Paris has a network of 199 kilometres and it serves 1191 million passengers annually.
For the newer systems, Washington DC is the biggest with 126 kilometres and 144 million passengers. Kyoto and Los Angeles are much smaller. Kyoto is the smallest system, it has only 11 kilometres and 45 million passengers. Los Angeles has 50 million passengers per year.