Final answer:
From 1960 to 2010, Singapore had the highest average annual growth rate. While countries like China and South Korea had rapid growth during certain periods, Singapore's consistently high growth over several decades likely averages out to be the highest.
Step-by-step explanation:
According to the information provided, East Asian Tigers, which includes Singapore, averaged 5.5% real per capita growth for several decades. In contrast, the text shows other countries' growth rates for specific periods but does not sustain those growth rates over the entire time frame from 1960 to 2010. China, for example, saw rapid growth from 1984 into the 2000s with rates around 9% per year, but this does not span the entire 50-year period in question. South Korea also experienced rapid growth, especially in the 1970s. However, Singapore's consistently high growth over several decades would likely translate to the highest average annual growth rate over the period specified.