Sweden: History
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                The union between Sweden and Norway is peacefully dissolved at Norway's request. This led to the creation of the first parliamentary government in Sweden. 
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                Steadily improving trade conditions result in a boom period that takes Sweden from a primarily agricultural economy to an industrial one. 
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                Sweden becomes a founding member of the Nordic Council, which is established to further the mutual interests of Scandinavian countries.
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                Sweden becomes a founding member of the European Free Trade Association (EFTA). 
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                Sweden becomes a member of the European Union. 
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                A referendum for Sweden to adopt the euro is defeated. The Swedish krona continues to be the national currency.
Sources:
BBC NewsBritannica
