| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,410 | $11,270 |
| 2016 | $20,446 | $11,548 |
| 2017 | $20,206 | $11,342 |
| 2018 | $20,206 | $11,207 |
| 2019 | $21,714 | $12,300 |
| 2020 | $21,716 | $12,302 |
| 2021* | $21,718 | $12,304 |
| 2022* | $21,720 | $12,307 |
| 2023* | $21,723 | $12,309 |
| 2024* | $21,725 | $12,312 |
| 2025* | $21,727 | $12,314 |