| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,366 | $18,282 |
| 2016 | $22,366 | $18,125 |
| 2017 | $22,302 | $18,026 |
| 2018 | $22,302 | $18,003 |
| 2019 | $23,106 | $18,039 |
| 2020 | $23,431 | $18,364 |
| 2021* | $23,431 | $18,340 |
| 2022* | $23,431 | $18,316 |
| 2023* | $23,431 | $18,292 |
| 2024* | $23,431 | $18,269 |
| 2025* | $23,431 | $18,245 |