| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,259 | $27,764 |
| 2016 | $28,440 | $25,938 |
| 2017 | $30,348 | $26,240 |
| 2018 | $30,348 | $25,575 |
| 2019 | $34,486 | $28,398 |
| 2020 | $35,253 | $29,165 |
| 2021* | $36,036 | $29,503 |
| 2022* | $36,836 | $29,846 |
| 2023* | $37,653 | $30,192 |
| 2024* | $38,489 | $30,542 |
| 2025* | $39,344 | $30,896 |