The given bar chart illustrates the sales of three types of music from 2000 to 2003, while the line graph depicts information about the same issue from 1960 to 1990.
Overall, the first graph shows that pop music was the dominant group throughout four years, whereas classical music was the least preffered. For the second graph, pop music witnessed an upward trend, while the remaining types show a reverse pattern.
In terms of the early 2000s, pop music was the highest in sales with over 4 billions in 2000 and reached its peak in 2001 with 5 billions. In 2002, this genre saw a slight decrease, accounting for 3.5 billions. In the next year, it occupied for 4 billions. Compared to the previous type, rock music shows a significant decrease in the total amount of four years. In the year 2000, it reached 3 billions and in 2001 it was a billion higher. Notably, the sales falled suddenly in the next year, from 4 billions to 2.1 billions. However, in 2003, it soared to approximately 3.5 billions. For classical music, it saw a significant difference compared to other genres. In 2000 and 2001, it fluctuated around over 1 billion. In the next two years, it reached 2 billion and 1.3 billion respectively.
Regarding the second period of time, pop music saw an upward trend, with more than 2 billions in 1960 shot up to 5 billions in 1990. In 1970 and 1980, it hit 4 billions and 4 billions and a half respectively. In contrast to pop music, classic music saw a downward trend, stood at 4 billions in 1960, declined to nearly 4 billions in 1970 and 3.3 billions in 1980. In the year 1990, it hit a low of 2 billions. As for the last type, rock music reached its lowest point in 1960 with 2 billions, then went up to 4 billions in the next year, rose to 4.5 billons in 1980 and finally dropped to over 3 billions in the last year.