Output then fell by 30% to 2010, when it began to pick up again.
Economic output had fallen 20 percent over the course of two years.
The economy here is in a deep recession, and output fell by 7.5 percent last year.
Its industrial output also fell, by 3.5% in the 12 months to March.
But total output for the quarter will fall far short of last year's level, industry officials estimate.
But industrial output has fallen in four of the past five months.
Many plan targets were not met, however, as industrial output fell in the second half of the year.
Economic output fell at a startling annual rate of 11.2 percent, the Government said.
Yes, the domestic market is growing but not quickly enough to take up the likely slack, so economic output will probably fall.
In 1961 the industry broke down; nearly all small plants were closed, and output fell to less than half the amount reported for 1960.