exports, heavy protection cf fledql i nq industries a ncl i r:efficie nt paru.statal processinq and marketir;q aqer.cies. 36. Acccrdir,q tc data prcvidec:iby FAO, production of the major i n.iustriu.l crcps (cocoa, coffee, cotton, qrou nd-nuts, sisal and tcLaccc) in develcpinq Africa ir.creasect by 11.7 per cent in 1981 atter a urcp of 5.3 per cent ir. 1980. The surqe emanated mainly frc.m tlte bumper coffee, qrourxl-r.ut ar;d suqar-cane harvests in 1SGL Table IV.A.10 Evolution of selected expert commodities, 1980-1981 Cocca Ccffee 1 Cotten 3 Crourii-l ...:ts 4 Sisal Sc..qar 57 Tt:a ';:eta CCC Production ( Thcusa nds cf tcr,nes) 1980 19[;1 986 <::!~4 167 1 288 308 3 205 558 5 201 218 188 295 64 687 193 19G 320 25G Growth rate ir: production (Perce r:taqe cha nae over pre cedi nq year) 1980 1981 -3.1 0.8 -0.9 10.4 3.1 -3.1 -2.8 14.1 26.7 -13.8 -6.2 12.9 -6.8 1.6 2.9 -20.0 Expert earninqs (Billions of US dollars) 1980 1981 1.99 1. 64 2.79 2.07 1.09 Q.96 0.12 0.20 o.o1 0.08 0.80 0.68 0.28 0.26 0.34 0.45 Scu .-ces: FAO Production Yearbook 1981 (Rome, FAO, 1982) arrl EC,\ sec _·etu.riat estimates. 37. Cc.:fee production ir; developinq Africa increased by 10.4 per c"-·r.t rrcm 1,167,000 tcr.r.es in 1980 to 1,288,000 tonr.es in 1981. Cuspi tL-these prcductior. qai ns, hc"\.rever, the wholesale price in­ .-.:t.:x ( 1975 = 100) slid dC\Hllo<~ards to 168.5 ·in 1981 compared to 42 E/ECA/CM.C:/5 241.2 in 1980. Consequently, export earnings for cevelop:_nq Africa declined to $2.1 billion from $2.8 billion .'..r 19EO. 38. The behaviour of irrlustrial crops in the rnajcr African producing countries has been rather mixed. In Uqanda, for ex­ ample, the proportion of the coffee crop rnarketec) thrcugh of:ti­ cial cha nr;els steadily declined until tlJe 1978/79 season. ':'he marketing system was seriously hampered by the lack of essential 