| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,132 | $17,236 |
| 2016 | $22,010 | $17,036 |
| 2017 | $20,910 | $15,690 |
| 2018 | $20,910 | $15,652 |
| 2019 | $20,078 | $14,346 |
| 2020 | $23,260 | $17,528 |
| 2021* | $23,132 | $17,325 |
| 2022* | $23,005 | $17,124 |
| 2023* | $22,878 | $16,925 |
| 2024* | $22,752 | $16,729 |
| 2025* | $22,627 | $16,535 |
