| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,552 | $8,175 |
| 2016 | $16,239 | $8,713 |
| 2017 | $17,854 | $10,972 |
| 2018 | $17,854 | $11,441 |
| 2019 | $18,534 | $12,442 |
| 2020 | $19,590 | $13,498 |
| 2021* | $20,707 | $14,644 |
| 2022* | $21,887 | $15,887 |
| 2023* | $23,134 | $17,236 |
| 2024* | $24,453 | $18,699 |
| 2025* | $25,847 | $20,287 |
