| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,032 | $14,522 |
| 2016 | $18,672 | $14,268 |
| 2017 | $18,528 | $14,911 |
| 2018 | $18,528 | $14,333 |
| 2019 | $18,827 | $14,960 |
| 2020 | $21,184 | $17,317 |
| 2021* | $21,184 | $18,074 |
| 2022* | $21,184 | $18,864 |
| 2023* | $21,184 | $19,688 |
| 2024* | $21,184 | $20,548 |
| 2025* | $21,184 | $21,446 |