| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,443 | $8,791 |
| 2016 | $16,882 | $8,520 |
| 2017 | $17,620 | $9,079 |
| 2018 | $17,620 | $8,023 |
| 2019 | $17,708 | $8,514 |
| 2020 | $17,750 | $8,556 |
| 2021* | $17,839 | $8,598 |
| 2022* | $17,928 | $8,640 |
| 2023* | $18,018 | $8,682 |
| 2024* | $18,108 | $8,725 |
| 2025* | $18,198 | $8,768 |
