The table shows the tax paid by an individual at different levels of income.
| Annual income ($) | Tax paid ($) |
|---|---|
| 20 00020\,00020000 | 1 5001\,5001500 |
| 30 00030\,00030000 | 3 0003\,0003000 |
| 45 00045\,00045000 | 5 2505\,2505250 |
| 60 00060\,00060000 | 8 2508\,2508250 |
What is the marginal tax rate for an individual whose annual income increases from 30 000 30\,000\,30000 to 45 00045\,00045000?
10%10\%10%
12%12\%12%
15%15\%15%
18%18\%18%
