| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,996 | $22,325 |
| 2016 | $38,334 | $23,741 |
| 2017 | $39,418 | $23,676 |
| 2018 | $39,418 | $21,387 |
| 2019 | $41,898 | $21,027 |
| 2020 | $43,108 | $22,237 |
| 2021* | $44,354 | $22,177 |
| 2022* | $45,636 | $22,117 |
| 2023* | $46,955 | $22,057 |
| 2024* | $48,312 | $21,998 |
| 2025* | $49,708 | $21,938 |