| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,774 | $13,318 |
| 2016 | $35,511 | $14,842 |
| 2017 | $35,676 | $13,547 |
| 2018 | $35,676 | $12,232 |
| 2019 | $35,973 | $12,861 |
| 2020 | $36,700 | $13,588 |
| 2021* | $37,005 | $14,286 |
| 2022* | $37,312 | $15,021 |
| 2023* | $37,621 | $15,793 |
| 2024* | $37,934 | $16,605 |
| 2025* | $38,249 | $17,458 |