| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,217 | $13,217 |
| 2016 | $19,245 | $11,679 |
| 2017 | $19,593 | $11,962 |
| 2018 | $19,593 | $12,252 |
| 2019 | $20,633 | $12,876 |
| 2020 | $20,761 | $13,004 |
| 2021* | $20,890 | $13,319 |
| 2022* | $21,019 | $13,641 |
| 2023* | $21,150 | $13,971 |
| 2024* | $21,281 | $14,309 |
| 2025* | $21,413 | $14,656 |
