The table shows the average annual percentage change in labour productivity.
What can be deduced from the data?

1 )
Manufacturing output increased faster than that in the rest of the economy over the entire period.
2 )
Productivity growth was at its highest in the 1980s.
Output per worker increased faster in manufacturing than in the rest of the economy.
4 )
Economic growth was at its lowest in the 1970s.
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