| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $38,582 | $22,180 |
| 2016 | $38,646 | $21,937 |
| 2017 | $39,656 | $22,294 |
| 2018 | $39,656 | $22,515 |
| 2019 | $32,442 | $19,985 |
| 2020 | $33,202 | $20,745 |
| 2021* | $33,258 | $20,950 |
| 2022* | $33,315 | $21,158 |
| 2023* | $33,372 | $21,367 |
| 2024* | $33,428 | $21,579 |
| 2025* | $33,485 | $21,792 |