For example, some 26 African countries, representing 78 per cent and 70 per cent of sub-Saharan Africa's GDP and population, respectively, experienced an average annual GDP growth of 6.9 per cent over the last decade.
例如，26个非洲国家，占撒哈拉以南非洲的国内生产总值的78％和人口的70％，在过去十年中平均年国内生产总值增长率为6.9％。