| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $38,831 | $21,846 |
| 2016 | $39,170 | $23,417 |
| 2017 | $37,070 | $16,846 |
| 2018 | $37,070 | $27,674 |
| 2019 | $37,954 | $25,151 |
| 2020 | $38,044 | $25,241 |
| 2021* | $38,135 | $25,332 |
| 2022* | $38,227 | $25,423 |
| 2023* | $38,319 | $25,515 |
| 2024* | $38,411 | $25,606 |
| 2025* | $38,503 | $25,699 |