| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,644 | $12,691 |
| 2016 | $21,162 | $13,158 |
| 2017 | $21,830 | $13,850 |
| 2018 | $21,830 | $13,605 |
| 2019 | $22,388 | $14,194 |
| 2020 | $22,609 | $14,415 |
| 2021* | $23,176 | $14,945 |
| 2022* | $23,758 | $15,495 |
| 2023* | $24,355 | $16,066 |
| 2024* | $24,966 | $16,657 |
| 2025* | $25,592 | $17,270 |
