| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,037 | $15,234 |
| 2016 | $20,788 | $15,883 |
| 2017 | $21,330 | $16,359 |
| 2018 | $21,330 | $16,653 |
| 2019 | $21,294 | $16,639 |
| 2020 | $21,294 | $16,639 |
| 2021* | $21,294 | $16,939 |
| 2022* | $21,294 | $17,243 |
| 2023* | $21,294 | $17,554 |
| 2024* | $21,294 | $17,870 |
| 2025* | $21,294 | $18,191 |