| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,246 | $10,964 |
| 2016 | $19,296 | $10,468 |
| 2017 | $19,466 | $11,313 |
| 2018 | $19,466 | $11,342 |
| 2019 | $20,516 | $12,829 |
| 2020 | $20,182 | $12,495 |
| 2021* | $20,234 | $12,527 |
| 2022* | $20,287 | $12,560 |
| 2023* | $20,340 | $12,593 |
| 2024* | $20,393 | $12,625 |
| 2025* | $20,446 | $12,658 |