The graph is illustrating the ratio of populating aged 65 and over in Japan, Sweden and USA. The three countries have different types of increasing ratio in the population aged 65 and over.

According to the graph, in USA and Sweden, the proportion has increased gradually between in 1940 and 2040. USA shows the most stable ratio among them. Sweden has a distinct style of increasing ratio which is like stairs. In Sweden and USA, after 2020, the proportion has boosted the most which are about 8%. Although three countries characterize their own ratio of population aged 65 and over, the most specific change is showed in Japan. By 2020, Japan shows the smallest number of population aged 65 and over. Suddenly, the population exploded around 2020. Recently, it has the biggest proportion of population aged 65 and over among the three countries, and the increased ratio is about 15%. Whatever the graph shows, it is evident that the three of countries have expanded the proportion aged 65 and over the most around 2040.

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