| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,614 | $9,055 |
| 2016 | $16,347 | $10,757 |
| 2017 | $17,944 | $12,662 |
| 2018 | $17,944 | $12,748 |
| 2019 | $18,337 | $12,613 |
| 2020 | $19,437 | $13,713 |
| 2021* | $20,603 | $14,909 |
| 2022* | $21,839 | $16,209 |
| 2023* | $23,150 | $17,622 |
| 2024* | $24,539 | $19,159 |
| 2025* | $26,011 | $20,830 |
