| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,318 | $11,208 |
| 2016 | $20,395 | $10,419 |
| 2017 | $20,650 | $10,868 |
| 2018 | $20,650 | $11,309 |
| 2019 | $20,915 | $8,386 |
| 2020 | $21,048 | $8,519 |
| 2021* | $21,183 | $8,654 |
| 2022* | $21,318 | $8,792 |
| 2023* | $21,455 | $8,932 |
| 2024* | $21,592 | $9,074 |
| 2025* | $21,730 | $9,218 |
