| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,500 | $10,970 |
| 2016 | $19,250 | $10,284 |
| 2017 | $19,250 | $9,717 |
| 2018 | $19,250 | $9,771 |
| 2019 | $19,700 | $10,430 |
| 2020 | $20,700 | $11,430 |
| 2021* | $21,184 | $11,494 |
| 2022* | $21,680 | $11,558 |
| 2023* | $22,187 | $11,623 |
| 2024* | $22,707 | $11,688 |
| 2025* | $23,238 | $11,754 |