Monaco first published its GDP in 2005. Information about how the GDP was calculated can be found on the Government Portal. In 2008, the share of GDP by industry was:
Source: Departement des Finances et de l'Economie, Direction de l'Expansion Economique. Produit Interieur Brut (PIB), Calcul et resultats 2008 - Rapport de Presentation. 2009.
The Government website also has further information on Monaco's economy.