| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,922 | $23,778 |
| 2016 | $30,616 | $24,595 |
| 2017 | $30,454 | $24,302 |
| 2018 | $30,454 | $23,117 |
| 2019 | $31,674 | $23,692 |
| 2020 | $33,170 | $25,188 |
| 2021* | $33,940 | $25,815 |
| 2022* | $34,727 | $26,458 |
| 2023* | $35,533 | $27,117 |
| 2024* | $36,357 | $27,792 |
| 2025* | $37,200 | $28,484 |