| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,366 | $18,589 |
| 2016 | $28,262 | $17,456 |
| 2017 | $28,352 | $18,166 |
| 2018 | $28,352 | $19,398 |
| 2019 | $36,256 | $28,282 |
| 2020 | $35,328 | $27,354 |
| 2021* | $35,441 | $28,467 |
| 2022* | $35,554 | $29,626 |
| 2023* | $35,668 | $30,832 |
| 2024* | $35,782 | $32,087 |
| 2025* | $35,897 | $33,392 |