| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,909 | $16,543 |
| 2016 | $19,343 | $15,162 |
| 2017 | $19,689 | $15,112 |
| 2018 | $19,689 | $14,411 |
| 2019 | $17,889 | $11,552 |
| 2020 | $13,662 | $7,325 |
| 2021* | $12,639 | $6,713 |
| 2022* | $11,692 | $6,153 |
| 2023* | $10,816 | $5,639 |
| 2024* | $10,006 | $5,168 |
| 2025* | $9,257 | $4,737 |
