Matching Pairs EU'S POPULATIONOnline version SOCIAL SCIENCE. PRIMARY SCHOOL. 5TH GRADE. by Gonzalo Barral 1 There are more 2 The population density 3 The average age 4 Inmigrants make up 5 The EU's fertility rate 6 There are 28 different countries in the EU. females than males in the EU. in the EU is increasing. 7% of the EU's population. is 1.6 children per family. of the EU is 114 per km2.