text: value of Nigeria's exports in 1982 was about 47 per cent lower than in 1980. Zaire's exports in 1981 were about 60 per cent ($1 billion) lower in value than a year previously. In 1981 only three countries (Egypt, the Sudan and Tunisia) were able to in­ crease their foreign exchange earnings, and the preliminary figures for 1982 place only Egypt in this category. 15. Thirteen of the countries imported more in 1981 tllan in 1980. High increases were experienced in the Libyan Arab Jamahiriya (56 per cent) and in Gabon (38 per cent). Of all the countries for which 1982 estimates are available, only the Ivory Coast imported more in 1982 than in 1981. 16. Table VI.A.6 shows the most important export commodities. The share of crude plus refined petroleum exceeds 70 per cent of total exports. About a dozen agricultural and mineral com­ modities contribute an additional 10 per cent. The combined share of the 1 isted cor.1r:1odit ies declined about 2 percentage points from 1980 to 1981, and the share of each individually also fell, with the exception of cotton, ground-nuts, iron ore, phos­ phates, sugar and tobacco. Table VI .A.6 Exports of some commodities from developing Africa Crude oil Coffee Refined petroleum Copper Cocoa Phosphates Cotton tlood Sugar Diamonds Uranium£_/ Iron ·ore Cabal t Tobacco Tea Ground-nuts Total Value (Billions of dollars) 1980 1981 67.00 52. 74 . 2.79 2.07 2.42 0.97 2.02 1. 33 1.99 1.64 1.17 1.11 1.09 o. 96 1.01 o. 71 0.80 0.68 o.eo 0.55 0.54 0.41 0.4 7 o.so 0.45 0.18 0.34 0.45 0.28 0.26 0.12 0.20 83.29 64.76 Source: ECA secretariat estimates. Share a/ (Percentage) 1980 1 981 69.6 68.7 2.9 2.7 2.5 1.3 2.1 1.7 2.1 2.1 1.2 1.4 1.1 1.3 1.0 0.9 o.e 0.9 o.e 0.7 0.6 o.s 0.5 0.7 0.5 0.2 
analysis: The text appears to be discussing the economic performance of developing African countries, specifically their exports, imports, and commodity shares. It highlights the decline in export values and the impact on foreign exchange earnings. The table provided provides a detailed breakdown of the export commodities, with a focus on crude oil and refined petroleum.