Complex sentence: Between 1978 and 2005, China's per capita GDP had grown from $153 to $1284, while its current account surplus had increased over twelve-fold between 1982 and 2004, from $5.7 billion to $71 billion.
Split into simpler sentences: Between 1978 and 2005, China's per capita GDP grew from $153 to $1,284. Its current account surplus increased more than twelve-fold between 1982 and 2004, from $5.7 billion to $71 billion.