The EU is 17 years old.
My mistake. I didn't read the entire article and misread this line, " A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency," to mean it was founded in 1999. Reading further down, I see that it was founded in 1993. Still, we're talking about an additional 6 years.