| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,668 | $16,314 |
| 2016 | $25,336 | $17,156 |
| 2017 | $26,308 | $18,480 |
| 2018 | $26,308 | $17,493 |
| 2019 | $27,474 | $18,325 |
| 2020 | $28,680 | $19,531 |
| 2021* | $29,781 | $20,539 |
| 2022* | $30,925 | $21,599 |
| 2023* | $32,112 | $22,713 |
| 2024* | $33,346 | $23,885 |
| 2025* | $34,626 | $25,118 |
