To begin with, the main characteristics of the countries at the start of the period are that Yemen's population is mostly divided between children up to 14 years and grown-ups under the age of 60, with a slight prevailance of youngsters and almost unconsiderable amount of elderly with 3,6%, while Italy has almost two thirds of it population (61,6%) in the working age gap and about a quarter (24,1%) of the nation is over 60 years in age, leaving 14,3% for children, as opposed to 50,1% in Yemen. 
