Forecasting Romania's Population 2020

While searching for population projections of Romania I came across several such forecasting data. The European Union statistics mothership, Eurostat, the United Nations or the Romanian Academy, all have quite some differences in their view of the future.

Before anything here is how the population of Romania looks like in the last 12 years.

And this is how the main projections stand when compared with a basic linear regression that I ran on the existing demographic data.