A cikin yarjejeniyar Maastricht, an ba da izini ga Birtaniya da Denmark bisa ga buƙatar su daga motsawa zuwa matakin haɗin kai wanda ya haifar da gabatarwar euro. (Domin ka'idar tattalin arziki, duba ƙasa Tambaya.): wace shekara ce aka sanya euro a cikin wasa?
Shekarar 1992