| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,650 | $18,207 |
| 2016 | $27,198 | $17,851 |
| 2017 | $27,792 | $18,550 |
| 2018 | $27,792 | $18,994 |
| 2019 | $30,288 | $18,896 |
| 2020 | $30,932 | $19,540 |
| 2021* | $31,591 | $20,007 |
| 2022* | $32,264 | $20,485 |
| 2023* | $32,951 | $20,975 |
| 2024* | $33,653 | $21,476 |
| 2025* | $34,370 | $21,989 |