| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $13,190 | $8,199 |
| 2016 | $13,460 | $9,416 |
| 2017 | $13,710 | $8,441 |
| 2018 | $13,710 | $8,850 |
| 2019 | $15,750 | $10,420 |
| 2020 | $15,950 | $10,620 |
| 2021* | $16,247 | $11,135 |
| 2022* | $16,549 | $11,675 |
| 2023* | $16,857 | $12,241 |
| 2024* | $17,170 | $12,835 |
| 2025* | $17,490 | $13,458 |