| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,376 | $11,659 |
| 2016 | $16,426 | $11,492 |
| 2017 | $16,553 | $11,616 |
| 2018 | $16,553 | $11,732 |
| 2019 | $17,107 | $11,709 |
| 2020 | $17,364 | $11,966 |
| 2021* | $17,498 | $12,086 |
| 2022* | $17,632 | $12,207 |
| 2023* | $17,768 | $12,329 |
| 2024* | $17,905 | $12,452 |
| 2025* | $18,043 | $12,576 |