| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,609 | $27,571 |
| 2016 | $33,734 | $28,171 |
| 2017 | $28,907 | $23,062 |
| 2018 | $28,907 | $22,967 |
| 2019 | $30,659 | $24,950 |
| 2020 | $31,895 | $26,186 |
| 2021* | $32,013 | $26,757 |
| 2022* | $32,131 | $27,340 |
| 2023* | $32,250 | $27,936 |
| 2024* | $32,370 | $28,545 |
| 2025* | $32,489 | $29,167 |
