Demand For Labor
  
When a woman is nine months pregnant and just can't wait to get that thing out of her body.
Uh...okay. Demand for Labor refers to a given economy's hunger for human bodies (not robots, in this calculation). When demand for labor is high or increasing, it's usually a solid sign that the economy is, well...solid. Growing. Strong.
Labor is one of the quicker reactors to economic change, so as a stat, it's tracked carefully.