| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,030 | $23,887 |
| 2016 | $34,184 | $24,504 |
| 2017 | $35,320 | $24,847 |
| 2018 | $35,320 | $24,281 |
| 2019 | $37,660 | $26,363 |
| 2020 | $39,738 | $28,441 |
| 2021* | $41,125 | $29,175 |
| 2022* | $42,560 | $29,927 |
| 2023* | $44,045 | $30,700 |
| 2024* | $45,583 | $31,492 |
| 2025* | $47,173 | $32,304 |