| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,203 | $15,748 |
| 2016 | $35,172 | $16,068 |
| 2017 | $36,111 | $15,337 |
| 2018 | $36,111 | $16,553 |
| 2019 | $36,765 | $16,512 |
| 2020 | $36,949 | $16,696 |
| 2021* | $37,134 | $16,881 |
| 2022* | $37,319 | $17,069 |
| 2023* | $37,506 | $17,258 |
| 2024* | $37,694 | $17,450 |
| 2025* | $37,882 | $17,643 |