| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,847 | $19,306 |
| 2016 | $24,804 | $19,736 |
| 2017 | $24,685 | $20,814 |
| 2018 | $24,685 | $19,716 |
| 2019 | $24,975 | $18,692 |
| 2020 | $24,684 | $18,401 |
| 2021* | $24,642 | $18,114 |
| 2022* | $24,600 | $17,831 |
| 2023* | $24,558 | $17,553 |
| 2024* | $24,517 | $17,279 |
| 2025* | $24,475 | $17,010 |
