Mikhail Gorbachev major campaign to limit alcohol consumption, which Gorbachev—who believed it would improve health and work efficiency—oversaw. His wife keenly supported the measure. As a result, crime rates fell and life expectancy grew slightly between 1986 and 1987. The reform had significant costs to the Soviet economy, resulting in losses of up to $100 billion between 1985 and 1990. Gorbachev later considered the campaign to have been an error. In April 1986 the Chernobyl disaster occurred; in the immediate aftermath, officials fed Gorbachev incorrect information to downplay the incident. As the scale of the disaster became apparent, 336,000 people were evacuated
Eleventh five-year plan (Soviet Union) to admit that there were economic "shortcomings" and acknowledged the ongoing "food problem". Other topics for discussion were the need to save energy resources and to improve the quality of Soviet produced goods. By the 1980s the Soviet economy had stagnated, with the natural gas industry the only Soviet fuel industry to surpass the five-year plan's indicators. Although 40,000 robots were produced during the plan, advances in computer technology decreased, due to growing disillusionment with the Soviet system. At the end of his life, former Premier Alexei Kosygin feared the complete failure of this five-year plan, claiming that the incumbent