| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $46,899 | $27,272 |
| 2016 | $47,717 | $25,455 |
| 2017 | $48,306 | $24,235 |
| 2018 | $48,306 | $21,424 |
| 2019 | $50,140 | $24,246 |
| 2020 | $51,544 | $25,650 |
| 2021* | $52,441 | $24,421 |
| 2022* | $53,353 | $23,252 |
| 2023* | $54,282 | $22,138 |
| 2024* | $55,226 | $21,077 |
| 2025* | $56,187 | $20,068 |