.The population of Denmark, as defined by Statistics Denmark, was estimated in January 2016 to be 5,707,251. The median age is 41.4 years, with 0.97 males per female. The total fertility rate is 1.73 children born per woman; despite the low birth rate, the population is still growing at an average annual rate of 0.22%. Notably, very few Down Syndrome children are born in Denmark, with 98% of DS pregnancies aborted in 2014. The World Happiness Report frequently ranks Denmark's population as the happiest in the world. This has been attributed to the country's highly regarded education and health care systems, and its low level ofincome inequality.