| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,463 | $13,869 |
| 2016 | $20,571 | $13,674 |
| 2017 | $20,571 | $13,167 |
| 2018 | $20,571 | $13,304 |
| 2019 | $20,954 | $11,461 |
| 2020 | $21,104 | $11,611 |
| 2021* | $21,216 | $11,447 |
| 2022* | $21,328 | $11,286 |
| 2023* | $21,441 | $11,127 |
| 2024* | $21,555 | $10,970 |
| 2025* | $21,669 | $10,815 |
