| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,321 | $17,228 |
| 2016 | $29,247 | $18,184 |
| 2017 | $30,215 | $18,443 |
| 2018 | $30,215 | $18,256 |
| 2019 | $31,716 | $18,672 |
| 2020 | $32,558 | $19,514 |
| 2021* | $33,623 | $19,959 |
| 2022* | $34,722 | $20,414 |
| 2023* | $35,858 | $20,879 |
| 2024* | $37,030 | $21,355 |
| 2025* | $38,241 | $21,842 |