Worldwide, approximately 40 per cent of children in developing countries are not registered by their fifth birthday and, in the least developed countries, that number can be as high as 71 per cent.
世界范围内，约40%的发展中国家的儿童在到其五岁生日之前没有登记户籍，在最不发达国家，这一数字可以高达71%。