| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,070 | $16,121 |
| 2016 | $28,820 | $18,356 |
| 2017 | $29,172 | $18,518 |
| 2018 | $29,172 | $19,050 |
| 2019 | $30,226 | $18,123 |
| 2020 | $30,540 | $18,437 |
| 2021* | $30,913 | $18,756 |
| 2022* | $31,290 | $19,080 |
| 2023* | $31,671 | $19,411 |
| 2024* | $32,058 | $19,746 |
| 2025* | $32,449 | $20,088 |
