| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,004 | $20,461 |
| 2016 | $36,068 | $21,672 |
| 2017 | $37,028 | $22,423 |
| 2018 | $37,028 | $21,119 |
| 2019 | $38,798 | $21,758 |
| 2020 | $41,018 | $23,978 |
| 2021* | $42,265 | $24,810 |
| 2022* | $43,550 | $25,671 |
| 2023* | $44,874 | $26,562 |
| 2024* | $46,238 | $27,483 |
| 2025* | $47,644 | $28,437 |