23. Metal and plastic pattern-makers

They lay out, machine, fit, and assemble castings and parts to metal or plastic foundry patterns, core boxes, or match plates.

Median annual pay: $40,960

Number of people who held this job in the US in 2014: 3,800

Predicted number of people who will hold this job in 2024: 2,900

Projected decline: 23.4%