| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,604 | $18,492 |
| 2016 | $28,851 | $18,816 |
| 2017 | $30,274 | $22,056 |
| 2018 | $30,274 | $23,046 |
| 2019 | $30,679 | $18,579 |
| 2020 | $30,899 | $18,799 |
| 2021* | $31,313 | $19,128 |
| 2022* | $31,733 | $19,463 |
| 2023* | $32,158 | $19,803 |
| 2024* | $32,589 | $20,150 |
| 2025* | $33,025 | $20,503 |