| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,415 | $19,908 |
| 2016 | $26,341 | $18,813 |
| 2017 | $26,046 | $18,774 |
| 2018 | $26,046 | $17,783 |
| 2019 | $27,915 | $19,571 |
| 2020 | $29,000 | $20,656 |
| 2021* | $29,000 | $20,613 |
| 2022* | $29,000 | $20,569 |
| 2023* | $29,000 | $20,526 |
| 2024* | $29,000 | $20,483 |
| 2025* | $29,000 | $20,440 |