| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,364 | $10,420 |
| 2016 | $19,826 | $10,836 |
| 2017 | $20,554 | $11,588 |
| 2018 | $20,554 | $11,679 |
| 2019 | $22,824 | $13,086 |
| 2020 | $23,638 | $13,900 |
| 2021* | $24,482 | $14,765 |
| 2022* | $25,356 | $15,683 |
| 2023* | $26,261 | $16,658 |
| 2024* | $27,199 | $17,695 |
| 2025* | $28,170 | $18,795 |