| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,014 | $14,259 |
| 2016 | $20,920 | $14,614 |
| 2017 | $21,452 | $15,170 |
| 2018 | $21,452 | $14,988 |
| 2019 | $18,740 | $13,364 |
| 2020 | $18,874 | $13,498 |
| 2021* | $19,010 | $13,633 |
| 2022* | $19,147 | $13,769 |
| 2023* | $19,285 | $13,907 |
| 2024* | $19,423 | $14,046 |
| 2025* | $19,563 | $14,187 |
