| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,383 | $8,627 |
| 2016 | $17,896 | $7,975 |
| 2017 | $19,290 | $9,055 |
| 2018 | $19,290 | $9,533 |
| 2019 | $21,080 | $11,571 |
| 2020 | $21,080 | $11,571 |
| 2021* | $21,702 | $12,182 |
| 2022* | $22,342 | $12,825 |
| 2023* | $23,001 | $13,502 |
| 2024* | $23,680 | $14,215 |
| 2025* | $24,378 | $14,966 |