The reality is the countries within the current EU experienced real growth which is likely to continue.
But if you want to cherry pick a few years it’s worth understanding the details. Germany’s per capita income increased from 41,572$ in 2010 to 47,974$/year in 2018 that’s a 15.4% increase despite a 14.4% drop in 2015. Notably that 14.4% 2015 drop was was linked to over 1.1 million asylum seekers from the Syrian War and part of a huge wave of legal and illegal immigration. Exclude that 2015 and Germany saw roughly the same per capita growth rate as the US.
> Some people still use stats from 2008. Since then EU is flat, both USA and China growing like crazy. India might catch up with EU in the next 20 years as well.
They are a member of the EU, but the seven non-eurozone members of the EU are Bulgaria, Czechia, Denmark, Hungary, Poland, Romania, and Sweden.
I also pointed out that BlueTankEngine‘s statements about the eurozone was also wrong.