Sao Tome and Principe has no single economic activity that serves as a driver of growth. Historically, agriculture has been a strongly performing sector, with exports of cocoa, coffee, and palm oil increasing in recent years. However, it hasn’t compensated for the growth of imports. Tourism is an important and growing activity, but it isn’t able to support growth on an economy-wide basis. Thus, the main driver of growth in the country is government expenditure.
Source The World Bank