At independence the value of the taka, Bangladesh's unit of currency, was set between 7.5 and 8.0 to US$1. With the exception of FY 1978, the taka's value relative to the dollar declined every year from 1971 through the end of 1987. To help offset this phenomenon, Bangladesh first used the compensatory financing facility of the International Monetary Fund (IMF--see Glossary) in FY 1974. Despite the increasing need for assistance, the Mujib government was initially unwilling to meet the IMF's conditions on monetary and fiscal policy. By FY1975, however, the government revised its stance, declaring a devaluation of the taka by 56 percent and agreeing to the establishment by the World Bank of the Bangladesh Aid Group (see Foreign Assistance, this ch.). Between 1980 and 1983, the taka sustained a decline of some 50 percent because of a deterioration in Bangladesh's balance of payments. Between 1985 and 1987, the taka was adjusted in frequent incremental steps, stabilizing again around 12 percent lower in real terms against the United States dollar, but at the same time narrowing the difference between the official rate and the preferential secondary rate from 15 percent to 7.5 percent. Accompanying this structural adjustment was an expansion in the amount of trade conducted at the secondary rate, to 53 percent of total exports and 28 percent of total imports. In mid- 1987, the official rate was relatively stable, approaching Tk31 to US$1.