| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,366 | $17,927 |
| 2016 | $22,366 | $17,821 |
| 2017 | $22,302 | $17,766 |
| 2018 | $22,302 | $17,606 |
| 2019 | $23,106 | $17,963 |
| 2020 | $23,431 | $18,288 |
| 2021* | $23,431 | $18,231 |
| 2022* | $23,431 | $18,175 |
| 2023* | $23,431 | $18,118 |
| 2024* | $23,431 | $18,062 |
| 2025* | $23,431 | $18,006 |