| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,328 | $30,233 |
| 2016 | $36,924 | $31,194 |
| 2017 | $37,892 | $31,422 |
| 2018 | $37,892 | N/A |
| 2019 | $39,308 | $33,916 |
| 2020 | $39,860 | $34,468 |
| 2021* | $40,514 | $35,030 |
| 2022* | $41,178 | $35,601 |
| 2023* | $41,853 | $36,181 |
| 2024* | $42,540 | $36,771 |
| 2025* | $43,238 | $37,370 |