| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,737 | $18,691 |
| 2016 | $29,576 | $19,821 |
| 2017 | $30,555 | $20,131 |
| 2018 | $30,555 | $19,460 |
| 2019 | $32,896 | $21,828 |
| 2020 | $35,730 | $24,662 |
| 2021* | $36,913 | $26,154 |
| 2022* | $38,134 | $27,736 |
| 2023* | $39,397 | $29,414 |
| 2024* | $40,701 | $31,194 |
| 2025* | $42,048 | $33,081 |