| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,571 | $28,580 |
| 2016 | $33,355 | $28,356 |
| 2017 | $33,989 | $29,547 |
| 2018 | $33,989 | $28,781 |
| 2019 | $30,788 | $22,286 |
| 2020 | $31,378 | $22,876 |
| 2021* | $31,974 | $22,698 |
| 2022* | $32,582 | $22,521 |
| 2023* | $33,201 | $22,345 |
| 2024* | $33,832 | $22,171 |
| 2025* | $34,474 | $21,998 |