| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,955 | $12,403 |
| 2016 | $19,486 | $12,509 |
| 2017 | $19,938 | $12,812 |
| 2018 | $19,938 | $12,522 |
| 2019 | $21,690 | $11,872 |
| 2020 | $22,121 | $12,303 |
| 2021* | $22,634 | $12,408 |
| 2022* | $23,159 | $12,513 |
| 2023* | $23,697 | $12,619 |
| 2024* | $24,246 | $12,727 |
| 2025* | $24,809 | $12,835 |
