| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,540 | $30,555 |
| 2016 | $36,712 | $30,863 |
| 2017 | $35,060 | $29,008 |
| 2018 | $35,060 | $28,303 |
| 2019 | $36,699 | $30,328 |
| 2020 | $37,312 | $30,941 |
| 2021* | $37,487 | $31,254 |
| 2022* | $37,664 | $31,569 |
| 2023* | $37,841 | $31,888 |
| 2024* | $38,018 | $32,210 |
| 2025* | $38,197 | $32,535 |