| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,922 | $24,781 |
| 2016 | $30,616 | $24,956 |
| 2017 | $30,454 | $24,737 |
| 2018 | $30,454 | $23,647 |
| 2019 | $31,674 | $21,340 |
| 2020 | $33,170 | $22,836 |
| 2021* | $33,940 | $22,635 |
| 2022* | $34,727 | $22,436 |
| 2023* | $35,533 | $22,238 |
| 2024* | $36,357 | $22,043 |
| 2025* | $37,200 | $21,849 |