| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $56,403 | $35,054 |
| 2016 | $58,141 | $34,895 |
| 2017 | $58,018 | $31,663 |
| 2018 | $58,018 | $31,237 |
| 2019 | $62,396 | $30,267 |
| 2020 | $64,554 | $32,425 |
| 2021* | $66,542 | $31,987 |
| 2022* | $68,592 | $31,555 |
| 2023* | $70,704 | $31,129 |
| 2024* | $72,882 | $30,709 |
| 2025* | $75,127 | $30,295 |