Surprising resilience Most advanced economies are expected to slow this year, driving the global growth decline, said the IMF. The world's second-biggest economy has in the past contributed up to 40 percent of global growth, IMF chief Kristalina Georgieva previously noted. But the United Kingdom saw a significant downgrade to its growth forecast, and is now seen to contract 0.6 percent this year. The world's second-biggest economy has in the past contributed up to 40 percent of global growth, IMF chief Kristalina Georgieva previously noted. But the United Kingdom saw a significant downgrade to its growth forecast, and is now seen to contract 0.6 percent this year.