Iceland, Norway, Australia, Canada and Ireland dominate the top places but the United States slipping to 12th place from eighth last year in the UN Human Development Index.

• 冰岛、挪威、澳大利亚、加拿大和爱尔兰在“人类发展指数”排行榜上名列前茅，而美国从去年的第8位跌至第12位。