| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,349 | $10,198 |
| 2016 | $15,790 | $10,500 |
| 2017 | $15,915 | $10,679 |
| 2018 | $15,915 | $10,589 |
| 2019 | $17,324 | $11,672 |
| 2020 | $18,411 | $12,759 |
| 2021* | $19,565 | $13,137 |
| 2022* | $20,792 | $13,526 |
| 2023* | $22,096 | $13,926 |
| 2024* | $23,481 | $14,338 |
| 2025* | $24,953 | $14,762 |