| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,330 | $20,351 |
| 2016 | $36,802 | $20,611 |
| 2017 | $38,724 | $22,378 |
| 2018 | $38,724 | $21,881 |
| 2019 | $41,650 | $21,519 |
| 2020 | $42,804 | $22,673 |
| 2021* | $44,589 | $22,963 |
| 2022* | $46,448 | $23,257 |
| 2023* | $48,385 | $23,555 |
| 2024* | $50,403 | $23,856 |
| 2025* | $52,505 | $24,162 |