| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,438 | $10,477 |
| 2016 | $18,941 | $10,761 |
| 2017 | $19,012 | $10,564 |
| 2018 | $19,012 | $10,700 |
| 2019 | $19,715 | $10,682 |
| 2020 | $20,192 | $11,159 |
| 2021* | $20,681 | $11,303 |
| 2022* | $21,181 | $11,449 |
| 2023* | $21,694 | $11,596 |
| 2024* | $22,219 | $11,746 |
| 2025* | $22,756 | $11,898 |
