| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,486 | $16,434 |
| 2016 | $22,486 | $16,230 |
| 2017 | $24,070 | $17,607 |
| 2018 | $24,070 | $17,271 |
| 2019 | $25,529 | $17,962 |
| 2020 | $25,355 | $17,788 |
| 2021* | $25,355 | $17,615 |
| 2022* | $25,355 | $17,445 |
| 2023* | $25,355 | $17,275 |
| 2024* | $25,355 | $17,108 |
| 2025* | $25,355 | $16,942 |