| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,850 | $15,498 |
| 2016 | $24,290 | $15,379 |
| 2017 | $24,290 | $15,458 |
| 2018 | $24,290 | $14,641 |
| 2019 | $25,890 | $15,857 |
| 2020 | $28,120 | $18,087 |
| 2021* | $28,637 | $18,179 |
| 2022* | $29,164 | $18,272 |
| 2023* | $29,701 | $18,365 |
| 2024* | $30,247 | $18,459 |
| 2025* | $30,804 | $18,553 |