| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,914 | $22,516 |
| 2016 | $39,760 | $23,995 |
| 2017 | $41,054 | $25,373 |
| 2018 | $41,054 | $21,661 |
| 2019 | $44,146 | $22,385 |
| 2020 | $45,206 | $23,445 |
| 2021* | $46,675 | $24,556 |
| 2022* | $48,192 | $25,720 |
| 2023* | $49,758 | $26,939 |
| 2024* | $51,376 | $28,216 |
| 2025* | $53,045 | $29,554 |