| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,982 | $17,893 |
| 2016 | $28,430 | $19,546 |
| 2017 | $29,279 | $20,897 |
| 2018 | $29,279 | $21,029 |
| 2019 | $31,777 | $22,838 |
| 2020 | $32,857 | $23,918 |
| 2021* | $33,974 | $25,571 |
| 2022* | $35,129 | $27,338 |
| 2023* | $36,324 | $29,227 |
| 2024* | $37,559 | $31,246 |
| 2025* | $38,836 | $33,405 |
