In an overview, it is clear that Lisbon was noted to have greatest number of train commuters, while Paris has the oldest and biggest rail network among all nations.
It is evident form the given data, the Paris Railway was inaugurated in 1863 and currently operates over 394 km of tracks, according to the statistics. Built in 1900, Stockholm has the second-oldest and biggest rail system, extending its course to over 199 kilometres. The railway networks in Rome and Lisbon were opened in 1976 and 1927 having 155 and 126 kilometres of rail tracks accordingly. Interestingly, with 11 kilometres of route, Madrid's rail system is the shortest in the world and it was established in 1981. The Berlin rail system, which has a total length of 28 kilometres, was just recently established in 2001.
Moving towards the second bar graph, with about 200 million travellers served annually, Lisbon rail station is the busiest in the world. Contrarily, although Paris has the largest and oldest train network, it only serves 775 million passengers annually and over half of these passengers commute via Stockholm. Surprisingly, with 144 million passengers annually, Rome's rail authorities serve nearly three times as many travellers as those in Berlin and Madrid.