| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,924 | $18,867 |
| 2016 | $24,880 | $20,711 |
| 2017 | $26,150 | $20,060 |
| 2018 | $26,150 | $20,299 |
| 2019 | $27,284 | $19,876 |
| 2020 | $27,880 | $20,472 |
| 2021* | $28,995 | $20,716 |
| 2022* | $30,155 | $20,962 |
| 2023* | $31,361 | $21,212 |
| 2024* | $32,616 | $21,464 |
| 2025* | $33,920 | $21,719 |