China's growth is leading the world with an 11.9% 2010 GDP target. Economic growth, urbanization and a growing middle class are driving robust infrastructure spending. China's construction spending is growing at 9% annually and is expected to reach $1.7 trillion by 2014. This translates to an estimated $15 billion spent on concrete mixing contracts for HSR alone. According to a McKinsey study, China will account for 50% of global building activity by 2015.