However Vestas' position looks to be increasingly under threat. According to the figures for 2009 its market share has fallen from 19% in 2008 to just over 14%.
The Chinese manufacturers Sinovel and Goldwind have made a big impact, taking the third and fifth positions respectively. Sinovel's share has risen from 5% to 9% while Goldwind's has increased from 4% to just over 7%.
The biggest decline has come from Gamesa. The Spanish manufacturer has fallen from third to seventh place with 6% of the market. GE has held on to its second place in the rankings, taking more than 12% of the global market share.