| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,030 | $35,598 |
| 2016 | $43,355 | $37,441 |
| 2017 | $44,030 | $37,799 |
| 2018 | $44,030 | $35,036 |
| 2019 | $44,431 | $36,305 |
| 2020 | $37,651 | $29,525 |
| 2021* | $37,994 | $29,808 |
| 2022* | $38,339 | $30,095 |
| 2023* | $38,688 | $30,384 |
| 2024* | $39,040 | $30,675 |
| 2025* | $39,396 | $30,970 |