This line chart shows the information about years to double population. To begin with, we can see that it starts from 1715, in 544 years’ time the population doubled from 0.375 billion to 0.75 billion.According to the graph, in 1804, in 304 years’ time the population doubled from 0.5 billion to 1.0 billion.Last but not the least, in 1881, in 166 years’ time the population doubled from 0.75 billion to 1.5 billion.In conclusion, the time period to double the population is becoming shorter and shorter.