Equatorial Guinea has other largely unexploited human and natural resources, including a tropical climate, fertile soils, rich expanses of water, deepwater ports, and an untapped, if unskilled, source of labor. Following independence in 1968, the country suffered under a repressive dictatorship for 11 years, which devastated the economy. The agricultural sector, which historically was known for cocoa of the highest quality, has never fully recovered. In 1969 Equatorial Guinea produced 36,161 tons of highly bid cocoa, but production dropped to 4,800 tons in 2000. Coffee production also dropped sharply during this period to bounce back to 100,000 metric tons in 2000. Timber is the main source of foreign exchange after oil, accounting for about 12.4% of total export earnings in 1996–99. Timber production increased steadily during the 1990s; wood exports reached a record 789,000 cubic meters in 1999 as demand in Asia (mainly China) gathered pace after the 1998 economic crisis. Most of the production (mainly Okoume) goes to exports, and only 3% is processed locally. Environmentalists fear that exploitation at this level is unsustainable and point out to the permanent damage already inflicted on the forestry reserves on Bioko.