| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,476 | $15,812 |
| 2016 | $28,992 | $14,850 |
| 2017 | $29,539 | $14,692 |
| 2018 | $29,539 | $14,177 |
| 2019 | $30,764 | $11,906 |
| 2020 | $31,420 | $12,562 |
| 2021* | $32,014 | $12,121 |
| 2022* | $32,619 | $11,696 |
| 2023* | $33,235 | $11,285 |
| 2024* | $33,864 | $10,889 |
| 2025* | $34,504 | $10,507 |