| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,724 | $19,778 |
| 2016 | $35,714 | $19,868 |
| 2017 | $35,786 | $20,944 |
| 2018 | $35,786 | $21,403 |
| 2019 | $38,164 | $23,499 |
| 2020 | $38,380 | $23,715 |
| 2021* | $38,457 | $24,234 |
| 2022* | $38,534 | $24,765 |
| 2023* | $38,611 | $25,307 |
| 2024* | $38,688 | $25,862 |
| 2025* | $38,765 | $26,428 |