The line graph illustrates the use of railway roads by four countries,China,Usa,Russia and İndia between the years of 1980 and 2010 respectively.
Overall,Usa and Russia experienced a downward trend over the period.In contrast İndia and China showed a marginal but considerable increase throughout the period.
Starting with Usa, in the first half of the 1980s it was accounted for 250 kilometers, being the highest raiway track in the group.For every year it kept increasing slightly but steadily, ending up with 220 kilometers approximately.Which means despite its downward trend it was still the longest railway track in the group. In 1980 the length of the railway track of the Russia was 150 kilometers.Similar to Usa,there were nothing but steady decrease for Russia.In 2010,ıt was reported as 125 kilometers approximately.
In early 1980s,the lenght of the railway tracks of the China and India were near to each other with 20 kilometers of difference roughly. They both showed a marginal increase over the time,however China surpassed India in 1995.During 1995-2010 they kept increasing consistently.