| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,561 | $13,018 |
| 2016 | $17,691 | $13,796 |
| 2017 | $17,734 | $13,062 |
| 2018 | $17,734 | $12,886 |
| 2019 | $20,340 | $15,284 |
| 2020 | $20,340 | $15,284 |
| 2021* | $20,389 | $15,284 |
| 2022* | $20,438 | $15,284 |
| 2023* | $20,487 | $15,284 |
| 2024* | $20,536 | $15,284 |
| 2025* | $20,585 | $15,284 |