| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,742 | $31,245 |
| 2016 | $39,546 | $33,127 |
| 2017 | $43,881 | $37,978 |
| 2018 | $43,881 | $38,241 |
| 2019 | $44,439 | $37,343 |
| 2020 | $48,424 | $41,328 |
| 2021* | $50,739 | $43,816 |
| 2022* | $53,164 | $46,454 |
| 2023* | $55,705 | $49,250 |
| 2024* | $58,368 | $52,215 |
| 2025* | $61,158 | $55,358 |