| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,494 | $26,210 |
| 2016 | $34,032 | $26,016 |
| 2017 | $35,108 | $27,042 |
| 2018 | $35,108 | $25,860 |
| 2019 | $36,122 | $27,198 |
| 2020 | $36,204 | $27,280 |
| 2021* | $36,287 | $27,362 |
| 2022* | $36,371 | $27,444 |
| 2023* | $36,454 | $27,526 |
| 2024* | $36,538 | $27,609 |
| 2025* | $36,622 | $27,692 |