| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,643 | $15,684 |
| 2016 | $26,654 | $18,493 |
| 2017 | $27,342 | $18,871 |
| 2018 | $27,342 | $18,906 |
| 2019 | $28,043 | $19,153 |
| 2020 | $28,716 | $19,826 |
| 2021* | $29,451 | $20,230 |
| 2022* | $30,205 | $20,643 |
| 2023* | $30,978 | $21,064 |
| 2024* | $31,771 | $21,494 |
| 2025* | $32,585 | $21,932 |