The line graph illustrates the number of users among three different passenger railway systems (National rail network, London underground, and Light rail & metro systems) available in the UK between the years 1940 and 2004-2005.
Overall, the London underground is the most used railway system in the UK and has increased over the years. Light rail and Metro systems are the least popular with the residents of the UK.
The London underground had approximately made 725 million journeys in 1950 and remained stable with minor fluctuations. In 1970, the numbers slightly dipped to 550 and fluctuated before dropping further to 500 million by 1980. The popularity of the underground rose markedly to 775 by 1990 and has since risen steadily to 1050 by 2004/05.
The National Rail Network made 1 billion trips in 1950 and rose to 1100 by 1956. It then suffered a steep decline, falling to 700 drivers by 1980. The numbers fluctuated a little but maintained an increasing trend to end with 1090 trips by the end of the time period. Light rail and metro systems were introduced only in the 1960s and were initially sparsely used, notably making no trips in 1980. Since then, it has increased consistently to 168 trips by 2004/05. 
The line graph illustrates the number of users among three  
different
 passenger railway  
systems
 (National  
rail
 network, London  
underground
, and Light  
rail
 & metro  
systems)
 available in the UK between the years 1940 and 2004-2005. 
Overall
, the London  
underground
 is the most  
used
 railway  
system
 in the UK and has increased over the years. Light  
rail
 and Metro  
systems
 are the least popular with the residents of the UK.
The London  
underground
 had approximately made 725 million journeys in 1950 and remained stable with minor fluctuations. In 1970, the numbers  
slightly
 dipped to 550 and fluctuated  
before
 dropping  
further
 to 500 million by 1980. The popularity of the  
underground
 rose  
markedly
 to 775 by 1990 and has since risen  
steadily
 to 1050 by 2004/05.
The National  
Rail
 Network made 1 billion  
trips
 in 1950 and rose to 1100 by 1956. It then suffered a steep decline, falling to 700 drivers by 1980. The numbers fluctuated a  
little
  but
 maintained an increasing trend to  
end
 with 1090  
trips
 by the  
end
 of the time period. Light  
rail
 and metro  
systems
  were introduced
  only
 in the 1960s and were  
initially
  sparsely
  used
,  
notably
 making no  
trips
 in 1980. Since then, it has increased  
consistently
 to 168  
trips
 by 2004/05.