| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $40,562 | $22,651 |
| 2016 | $41,442 | $26,317 |
| 2017 | $44,206 | $27,152 |
| 2018 | $44,206 | $26,289 |
| 2019 | $45,237 | $21,998 |
| 2020 | $46,992 | $23,753 |
| 2021* | $48,087 | $24,506 |
| 2022* | $49,207 | $25,283 |
| 2023* | $50,354 | $26,084 |
| 2024* | $51,527 | $26,911 |
| 2025* | $52,728 | $27,764 |