| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,334 | $9,423 |
| 2016 | $14,416 | $9,363 |
| 2017 | $14,416 | $9,314 |
| 2018 | $14,416 | $9,833 |
| 2019 | $14,474 | $8,546 |
| 2020 | $18,746 | $12,818 |
| 2021* | $18,821 | $12,751 |
| 2022* | $18,896 | $12,685 |
| 2023* | $18,972 | $12,619 |
| 2024* | $19,048 | $12,553 |
| 2025* | $19,124 | $12,488 |