| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,503 | $9,670 |
| 2016 | $17,804 | $13,616 |
| 2017 | $17,864 | $12,669 |
| 2018 | $17,864 | $12,692 |
| 2019 | $19,950 | $14,531 |
| 2020 | $20,778 | $15,359 |
| 2021* | $21,640 | $16,234 |
| 2022* | $22,538 | $17,160 |
| 2023* | $23,474 | $18,138 |
| 2024* | $24,448 | $19,172 |
| 2025* | $25,462 | $20,265 |