| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $43,720 | $20,126 |
| 2016 | $44,313 | $20,158 |
| 2017 | $45,397 | $23,205 |
| 2018 | $45,397 | $23,691 |
| 2019 | $48,593 | $27,142 |
| 2020 | $49,895 | $28,444 |
| 2021* | $51,117 | $29,809 |
| 2022* | $52,370 | $31,240 |
| 2023* | $53,653 | $32,740 |
| 2024* | $54,967 | $34,311 |
| 2025* | $56,314 | $35,958 |