| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,817 | $28,447 |
| 2016 | $33,808 | $28,154 |
| 2017 | $35,640 | $31,067 |
| 2018 | $35,640 | $31,253 |
| 2019 | $38,070 | $29,515 |
| 2020 | $40,160 | $31,605 |
| 2021* | $42,337 | $31,795 |
| 2022* | $44,631 | $31,985 |
| 2023* | $47,050 | $32,177 |
| 2024* | $49,600 | $32,370 |
| 2025* | $52,289 | $32,565 |