| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,270 | $14,750 |
| 2016 | $16,734 | $10,825 |
| 2017 | $21,156 | $14,281 |
| 2018 | $21,156 | $13,595 |
| 2019 | $21,674 | $12,925 |
| 2020 | $22,537 | $13,788 |
| 2021* | $23,089 | $13,126 |
| 2022* | $23,655 | $12,496 |
| 2023* | $24,234 | $11,896 |
| 2024* | $24,828 | $11,325 |
| 2025* | $25,436 | $10,782 |