| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,392 | $10,969 |
| 2016 | $18,348 | $11,656 |
| 2017 | $18,812 | $11,163 |
| 2018 | $18,812 | $11,963 |
| 2019 | $19,993 | $13,640 |
| 2020 | $19,993 | $13,640 |
| 2021* | $20,499 | $14,494 |
| 2022* | $21,017 | $15,401 |
| 2023* | $21,549 | $16,365 |
| 2024* | $22,094 | $17,390 |
| 2025* | $22,653 | $18,478 |