Despite this significant improvement, the ambitious target of a two thirds reduction between 1990 and 2015, as contained in Millennium Development Goal 4, was not achieved at the global scale (United Nations IGME, 2015). In 2010-2015, the under-five mortality rate in the less developed regions was 54 per 1,000, more than nine times as high as in the more developed regions, where it stood at 6 per 1,000 live births. Among other countries of the less developed regions, the risk of dying before age five was 45 per 1,000 live births, slightly more than half the level of the least developed countries.