| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,540 | $31,542 |
| 2016 | $36,712 | $31,830 |
| 2017 | $34,780 | $30,603 |
| 2018 | $34,780 | $29,731 |
| 2019 | $36,827 | $27,659 |
| 2020 | $37,312 | $28,144 |
| 2021* | $37,487 | $27,342 |
| 2022* | $37,664 | $26,563 |
| 2023* | $37,841 | $25,806 |
| 2024* | $38,018 | $25,070 |
| 2025* | $38,197 | $24,356 |
