| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,702 | $23,241 |
| 2016 | $28,756 | $24,497 |
| 2017 | $29,680 | $24,932 |
| 2018 | $29,680 | $23,943 |
| 2019 | $31,738 | $26,323 |
| 2020 | $31,738 | $26,323 |
| 2021* | $32,757 | $26,792 |
| 2022* | $33,808 | $27,268 |
| 2023* | $34,894 | $27,754 |
| 2024* | $36,014 | $28,248 |
| 2025* | $37,170 | $28,751 |