This line chart shows the information about the relationship between income distribution in 1970 and 2000 in terms of income per year and number of people. To begin with, we can see that there are several sections in this picture, that is, China and USA and so on. According to the graph, in terms of China, the largest number is about 1000 and 5000 in 1970 and 2000 respectively. Last but not the least, in terms of USA, the largest number is about 10,000 and 50,000 respectively. In conclusion, I think it is beneficial because it tells me income distribution in 1970 and 2000.