| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $45,640 | $26,324 |
| 2016 | $45,840 | $25,951 |
| 2017 | $46,898 | $23,810 |
| 2018 | $46,898 | $24,567 |
| 2019 | $47,398 | $22,364 |
| 2020 | $48,574 | $23,540 |
| 2021* | $49,094 | $23,206 |
| 2022* | $49,619 | $22,876 |
| 2023* | $50,150 | $22,551 |
| 2024* | $50,687 | $22,231 |
| 2025* | $51,229 | $21,915 |