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Madrid • Spain's National Statistics Institute says money generated by drug trafficking, prostitution, smuggling and illegal gambling contributed some $11.4 billion to the national economy last year.

The institute said illegal activities represented 0.9 percent of total economic activity. The figures are being included in GDP calculations on the recommendation of the European Union, which is trying to harmonize estimates across member states and get a full picture of economic activity, whether legal or not. The institute based the estimates for illegal activities on government reports.