| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,568 | N/A |
| 2016 | $18,550 | N/A |
| 2017 | $18,590 | $14,146 |
| 2018 | $18,590 | $17,840 |
| 2019 | $20,550 | $16,666 |
| 2020 | $21,780 | $17,896 |
| 2021* | $22,998 | $19,217 |
| 2022* | $24,283 | $20,635 |
| 2023* | $25,640 | $22,158 |
| 2024* | $27,074 | $23,793 |
| 2025* | $28,587 | $25,549 |