| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,210 | $17,820 |
| 2016 | $25,074 | $18,903 |
| 2017 | $25,837 | $20,167 |
| 2018 | $25,837 | $19,234 |
| 2019 | $27,642 | $21,992 |
| 2020 | $29,158 | $23,508 |
| 2021* | $30,199 | $25,081 |
| 2022* | $31,277 | $26,759 |
| 2023* | $32,394 | $28,549 |
| 2024* | $33,550 | $30,459 |
| 2025* | $34,748 | $32,496 |
