| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,081 | $27,450 |
| 2016 | $32,250 | $27,457 |
| 2017 | $32,410 | $26,838 |
| 2018 | $32,410 | $27,190 |
| 2019 | $35,143 | $30,064 |
| 2020 | $35,706 | $30,627 |
| 2021* | $35,885 | $31,028 |
| 2022* | $36,064 | $31,435 |
| 2023* | $36,244 | $31,846 |
| 2024* | $36,425 | $32,264 |
| 2025* | $36,608 | $32,686 |