Table 1: Projected heat pump installations and vocational technical graduates in Germany (000s), 2024 to 2035
| Metric | Year 2024 | Year 2035 (forecast) |
|---|---|---|
| Cumulative domestic heat pump installations | 1,500 | 5,800 |
| Annual heat pump installation targets | 250 | 750 |
| Annual HVAC and plumbing apprenticeship graduates | 85 | 68 |
| Total active building-services workforce (aged 18–64) | 520 | 545 |
Explain how the data in Table 1 show that there is likely to be substantial upward pressure on the wages of heat pump installation technicians in Germany by 2035.