This partial reform was quite successful in the beginning. Starting from 1979, agricultural growth accelerated at 6.6 percent per year on average during 1981–84, reaching its peak at 10.6 percent in 1982. Compared with the 1976–80 period, food per capita increased from 260 kilograms (kg) to 293 kg during 1981–84. Nevertheless, such reform measures arguably had only an ad hoc effect on output growth. Agricultural growth started to decelerate in 1983. In particular, food production increased less than 1 percent in 1983, leading to a decline in food per capita under the minimum subsistence level of 300 kg. Inflation accelerated at more than 60 percent per year during 1980–84. The gap between free market and official prices was kept at 10 times or more (Nguyen 2006).