| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,211 | $18,452 |
| 2016 | $25,482 | $19,400 |
| 2017 | $26,224 | $20,066 |
| 2018 | $26,224 | $19,453 |
| 2019 | $28,320 | $20,555 |
| 2020 | $29,249 | $21,484 |
| 2021* | $30,208 | $22,455 |
| 2022* | $31,199 | $23,470 |
| 2023* | $32,223 | $24,531 |
| 2024* | $33,279 | $25,640 |
| 2025* | $34,371 | $26,799 |