Which of the following years exhibited highest percentage increase over the preceding year in the automobile sales?

Total domestic sales of automobiles in the year 2004 = (700+450+300) = 1450

Total domestic sales of automobiles in the year  2005 = (675+500+350) = 1525

Total domestic sales of automobiles in the year  2006 = (900+625+400) = 1925

Total domestic sales of automobiles in the year  2007 = (1050+600+375) = 2025

Total domestic sales of automobiles in the year  2008 = (975+550+350) = 1875

We can see that the automobiles sales rose by the highest amount in the year 2006 as compared to other years. Also, the base is relatively smaller for remaining year except 2004. But the absolute growth is much higher in the year 2006 as compared to the year 2005. Hence, option B is the correct answer.