Since the island country's independence in 1966, the economy of Barbados has been transformed from a low-income economy dependent upon sugar production into an upper-middle-income economy based on tourism and the offshore sector. Barbados went into a deep recession in the 1990s after 3 years of steady decline brought on by fundamental macroeconomic imbalances. After a painful re-adjustment process, the economy began to grow again in 1993. Growth rates have averaged between 3%–5% since then. The country's three main economic drivers are: tourism, the international business sector, and foreign direct-investment. These are supported in part by Barbados operating as a service-driven economy and an international business centre.