| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,606 | $19,578 |
| 2016 | $34,490 | $19,476 |
| 2017 | $34,490 | $19,008 |
| 2018 | $34,490 | $19,444 |
| 2019 | $35,130 | $20,093 |
| 2020 | $35,570 | $20,533 |
| 2021* | $36,015 | $20,983 |
| 2022* | $36,465 | $21,442 |
| 2023* | $36,921 | $21,912 |
| 2024* | $37,382 | $22,392 |
| 2025* | $37,849 | $22,882 |