| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,808 | $34,362 |
| 2016 | $38,540 | $37,107 |
| 2017 | $39,600 | $34,837 |
| 2018 | $39,600 | $33,785 |
| 2019 | $41,180 | $35,347 |
| 2020 | $42,628 | $36,795 |
| 2021* | $43,800 | $38,304 |
| 2022* | $45,005 | $39,874 |
| 2023* | $46,242 | $41,509 |
| 2024* | $47,514 | $43,211 |
| 2025* | $48,821 | $44,982 |