| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,240 | $15,420 |
| 2016 | $24,500 | $16,196 |
| 2017 | $25,370 | $17,836 |
| 2018 | $25,370 | $17,435 |
| 2019 | $27,170 | $17,151 |
| 2020 | $28,552 | $18,533 |
| 2021* | $30,005 | $19,465 |
| 2022* | $31,533 | $20,444 |
| 2023* | $33,138 | $21,473 |
| 2024* | $34,824 | $22,553 |
| 2025* | $36,597 | $23,687 |