| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,423 | $12,557 |
| 2016 | $19,245 | $11,829 |
| 2017 | $19,593 | $12,608 |
| 2018 | $19,593 | $12,061 |
| 2019 | $20,633 | $12,744 |
| 2020 | $20,761 | $12,872 |
| 2021* | $20,890 | $13,001 |
| 2022* | $21,019 | $13,131 |
| 2023* | $21,150 | $13,262 |
| 2024* | $21,281 | $13,395 |
| 2025* | $21,413 | $13,529 |
