| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,450 | $17,842 |
| 2016 | $23,450 | $15,170 |
| 2017 | $25,070 | $17,995 |
| 2018 | $25,070 | $21,642 |
| 2019 | $25,570 | $19,551 |
| 2020 | $27,670 | $21,651 |
| 2021* | $28,221 | $23,976 |
| 2022* | $28,782 | $26,551 |
| 2023* | $29,355 | $29,403 |
| 2024* | $29,939 | $32,561 |
| 2025* | $30,535 | $36,058 |
