The graph below shows the number of passenger railway journeys made in Great Britain between 1950 and 2004/5

The provided graph presents the data about the number of people who traveled by train in Great Britain from 1950 to 2004/5. Overall, passengers in the National rail network kept gradually decreasing until hitting the nadir at around the middle of the period; however, those of London underground reduced to the lowest in the same timeframe, from thereupon, both simultaneously improved and peaked. While the Light rail and metro system users marginally decreased for half of the time before slowly growing to the highest. In the beginning, 1 billion citizens commuted through the National railway network, which slightly rose to about 1. 1 billion around 1955 before slowly decreasing and hitting the nadir at near 600 million in the early 80s. In contrast, the travel through London underground remained almost stable for about 25 years; after that, it fell to its lowest at half a billion. From thereon, it experienced a boom and reached the acme at around 1 billion passenger journeys in 2004/5; similarly, the figures of trips made through National railway network also boomed at the same time and reached the previous high at around 1100 million in the end. Comparatively, very few used light rails and metro systems, which slightly diminished until 1980, furthermore, it slowly soared to the peak at around 200 million passengers in the 2004/5.