PARIS – When the International Monetary Fund lowered its global growth forecast for 2014 and 2015 from 3.7% and 3.9%, respectively, to 3.3% and 3.8%, it cited the eurozone’s increasingly gloomy prospects, including significantly slower growth in Germany, as a leading cause. After all, the eurozone still accounts for about 13% of world output at market prices – about the same as China.