The other major drag on the economy was state debt. Traditional views of the French Revolution often attribute the financial crisis to the costs of the 1778–1783 Anglo-French War, but modern economic studies show this is only a partial explanation. In 1788, the ratio of debt to gross national income in France was 55.6%, compared to 181.8% in Britain, and although French borrowing costs were higher, the percentage of revenue devoted to interest payments was roughly the same in both countries. One historian concludes "neither the level of French state debt in 1788, or its previous history, can be considered an explanation for the outbreak of revolution in 1789".