| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,237 | $23,016 |
| 2016 | $43,152 | $21,226 |
| 2017 | $44,248 | $23,069 |
| 2018 | $44,248 | $20,214 |
| 2019 | $45,954 | $19,452 |
| 2020 | $47,046 | $20,544 |
| 2021* | $48,166 | $19,769 |
| 2022* | $49,312 | $19,024 |
| 2023* | $50,486 | $18,307 |
| 2024* | $51,687 | $17,617 |
| 2025* | $52,917 | $16,953 |