| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,940 | $17,198 |
| 2016 | $15,978 | $11,579 |
| 2017 | $16,014 | $11,554 |
| 2018 | $16,014 | $11,767 |
| 2019 | $16,950 | $12,523 |
| 2020 | $17,210 | $12,783 |
| 2021* | $17,250 | $13,018 |
| 2022* | $17,289 | $13,258 |
| 2023* | $17,329 | $13,502 |
| 2024* | $17,369 | $13,750 |
| 2025* | $17,409 | $14,003 |