(Table) According to the table, what is the labor force of this economy? 
Definitions:
Absolute Threshold
The minimum stimulus intensity required to detect a stimulus at least half the time.
Sensory Adaptation
The mechanism by which sensory receptors reduce their sensitivity to sustained stimuli as time progresses.
Signal Detection Theory
A psychological theory that describes how individuals decide on the presence or absence of a stimulus under conditions of uncertainty.
Ganglion Cells
Neurons located in the retina of the eye that integrate visual information before it's transmitted to the brain via the optic nerve.
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