| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,923 | $20,509 |
| 2016 | $44,065 | $21,105 |
| 2017 | $45,253 | $21,637 |
| 2018 | $45,253 | $20,200 |
| 2019 | $47,307 | $20,885 |
| 2020 | $46,893 | $20,471 |
| 2021* | $48,140 | $20,987 |
| 2022* | $49,421 | $21,516 |
| 2023* | $50,735 | $22,058 |
| 2024* | $52,085 | $22,614 |
| 2025* | $53,471 | $23,184 |