| Class | I | less than $2,250 |
|
| Class | II | at least $ 2,250 | but less than $ 4,000 |
| Class | III | at least $ 4,000 | but less than $ 7,000 |
| Class | IV | at least $ 7,000 | but less than $ 10,000 |
| Class | V | at least $10,000 | but less than $ 15,000 |
| Class | VI | at least $15,000 | but less than $ 22,000 |
| Class | VII | at least $22,000 | but less than $ 30,000 |
| Class | VIII | at least $30,000 | but less than $ 42,500 |
| Class | IX | at least $42,500 | but less than $ 50,000 |
| Class | X | at least $50,000 | but less than $ 60,000 |
| Class | XI | at least $60,000 | but less than $ 70,000 |
| Class | XII | at least $70,000 | but less than $ 80,000 |
| Class | XIII | at least $80,000 | but less than $ 90,000 |
| Class | XIV | at least $90,000 | but less than $100,000 |
| Class | XV | at least $100,000 | but less than $150,000 |
| Class | XVI | at least $150,000 | but less than $200,000 |
| Class | XVII | at least $200,000 |
|