| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,269 | $23,643 |
| 2016 | $31,149 | $24,854 |
| 2017 | $30,789 | $24,083 |
| 2018 | $30,789 | $24,294 |
| 2019 | $31,149 | $25,301 |
| 2020 | $31,509 | $25,661 |
| 2021* | $31,875 | $26,025 |
| 2022* | $32,244 | $26,395 |
| 2023* | $32,618 | $26,770 |
| 2024* | $32,997 | $27,150 |
| 2025* | $33,379 | $27,535 |