| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,675 | $11,355 |
| 2016 | $29,938 | $11,079 |
| 2017 | $31,515 | $12,498 |
| 2018 | $31,515 | $10,344 |
| 2019 | $34,231 | $10,854 |
| 2020 | $35,599 | $12,222 |
| 2021* | $37,165 | $12,825 |
| 2022* | $38,801 | $13,457 |
| 2023* | $40,508 | $14,120 |
| 2024* | $42,290 | $14,816 |
| 2025* | $44,151 | $15,547 |
