| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,886 | $11,845 |
| 2016 | $18,227 | $12,671 |
| 2017 | $18,486 | $12,441 |
| 2018 | $18,486 | $13,070 |
| 2019 | $18,491 | $12,848 |
| 2020 | $19,257 | $13,614 |
| 2021* | $19,530 | $14,303 |
| 2022* | $19,808 | $15,027 |
| 2023* | $20,089 | $15,787 |
| 2024* | $20,374 | $16,586 |
| 2025* | $20,664 | $17,425 |
