| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,457 | $32,018 |
| 2016 | $36,673 | $30,816 |
| 2017 | $39,383 | $31,441 |
| 2018 | $39,383 | $33,557 |
| 2019 | $40,750 | $34,787 |
| 2020 | $41,924 | $35,961 |
| 2021* | $43,131 | $37,173 |
| 2022* | $44,374 | $38,426 |
| 2023* | $45,652 | $39,721 |
| 2024* | $46,966 | $41,059 |
| 2025* | $48,319 | $42,443 |