人口ピラミッド
https://www.ipss.go.jp/site-ad/TopPageData/PopPyramid2017_J.html
2020
https://www.ipss.go.jp/site-ad/TopPageData/2020.png
2030
https://www.ipss.go.jp/site-ad/TopPageData/2030.png
2040
https://www.ipss.go.jp/site-ad/TopPageData/2040.png
2050
https://www.ipss.go.jp/site-ad/TopPageData/2050.png