| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $58,212 | $35,098 |
| 2016 | $58,506 | $36,261 |
| 2017 | $61,010 | $35,477 |
| 2018 | $61,010 | $34,166 |
| 2019 | $65,456 | $32,442 |
| 2020 | $65,172 | $32,158 |
| 2021* | $65,504 | $31,463 |
| 2022* | $65,838 | $30,784 |
| 2023* | $66,174 | $30,119 |
| 2024* | $66,512 | $29,468 |
| 2025* | $66,851 | $28,832 |
