The latter group can sometimes include Bulgaria, Romania and Croatia, which joined the union later and are therefore excluded from this analysis, as the main purpose is a comparison after 15 years of membership.
Med nove lahko štejemo tudi po letu 2004 pridružene Romunijo, Bolgarijo in Hrvaško, vendar pa te v tej analizi niso upoštevane, ker gre za primerjavo po 15 letih članstva.