| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,034 | $12,455 |
| 2016 | $25,948 | $11,912 |
| 2017 | $26,595 | $13,469 |
| 2018 | $26,595 | $12,544 |
| 2019 | $28,394 | $15,353 |
| 2020 | $29,319 | $16,278 |
| 2021* | $30,049 | $17,258 |
| 2022* | $30,797 | $18,297 |
| 2023* | $31,564 | $19,398 |
| 2024* | $32,350 | $20,566 |
| 2025* | $33,156 | $21,804 |