| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $45,004 | $27,215 |
| 2016 | $46,348 | $27,422 |
| 2017 | $47,310 | $26,563 |
| 2018 | $47,310 | $25,464 |
| 2019 | $49,672 | $24,573 |
| 2020 | $50,812 | $25,713 |
| 2021* | $51,981 | $24,908 |
| 2022* | $53,176 | $24,129 |
| 2023* | $54,399 | $23,373 |
| 2024* | $55,650 | $22,642 |
| 2025* | $56,930 | $21,933 |