| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,680 | $15,525 |
| 2016 | $25,178 | $18,161 |
| 2017 | $26,034 | $18,604 |
| 2018 | $26,034 | $18,757 |
| 2019 | $28,268 | $20,194 |
| 2020 | $26,724 | $18,650 |
| 2021* | $27,264 | $19,105 |
| 2022* | $27,815 | $19,571 |
| 2023* | $28,376 | $20,049 |
| 2024* | $28,950 | $20,538 |
| 2025* | $29,534 | $21,039 |