| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,060 | $19,742 |
| 2016 | $30,910 | $18,974 |
| 2017 | $31,950 | $22,002 |
| 2018 | $31,950 | $20,398 |
| 2019 | $32,880 | $19,789 |
| 2020 | $33,639 | $20,548 |
| 2021* | $34,591 | $19,934 |
| 2022* | $35,570 | $19,338 |
| 2023* | $36,577 | $18,759 |
| 2024* | $37,612 | $18,198 |
| 2025* | $38,676 | $17,654 |