| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,302 | $19,165 |
| 2016 | $30,002 | $18,532 |
| 2017 | $31,044 | $18,167 |
| 2018 | $31,044 | $17,414 |
| 2019 | $34,284 | $19,597 |
| 2020 | $35,074 | $20,387 |
| 2021* | $35,912 | $19,985 |
| 2022* | $36,771 | $19,592 |
| 2023* | $37,649 | $19,206 |
| 2024* | $38,549 | $18,827 |
| 2025* | $39,471 | $18,456 |