Pordata said there are 1.5 million fewer youths than 40 years ago and while in 1975 they accounted for half of the population, by 2015 they were less than a third.
In terms of education, the situation has changed markedly in two decades, More youths are entering and completing secondary school with the real education rate rising from 40 percent in 1992 to 75 percent in 2016.
School drop-out numbers have fallen from 50 percent in 1992 to 14 percent in 2016, while the proportion going on to university has increased from 81,083 in 1996, to 112,701 in 2016.
Youths are still badly affected by unemployment with 28 percent of under 25s out of work compared with 10 percent of the population aged between 25 and 54.
Back in 1990, women got married on average at 24 and men at 26, but 25 years later the average ages have gone up to 31 and 33 respectively.
The age of having the first child has similarly gone up from 25 in 1990, to 30 in 2015, and now a majority of children are born outside of marriage (15 percent in 1990, compared with 51 percent in 2015).