The 10 NUTS-1 and NUTS-2 regions with the highest GDP per capita are almost all, except one, in the first fifteen-member states: Prague is the only one in the 13 new member states that joined in May 2004, January 2007 and July 2013. The leading regions in the ranking of NUTS-2 regional GDP per inhabitant in 2019 were the Grand Duchy of Luxembourg (260%), Southern Ireland (240%), and Prague Czech Republic (205%). Figures for these three regions, however, were artificially inflated by the commuters who do not reside in these regions ("Net commuter inflows in these regions push up production to a level that could not be achieved by the resident active population on its own. The result is that GDP per inhabitant appears to be overestimated in these regions and underestimated in regions with commuter outflows.". Another example of artificial inflation is Groningen. The calculated GDP per capita is very high because of the large natural gas reserves in this region, but Groningen is one of the poorest parts in the Netherlands.