| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,722 | $9,499 |
| 2016 | $17,083 | $11,764 |
| 2017 | $17,240 | $11,888 |
| 2018 | $17,240 | $11,980 |
| 2019 | $18,032 | $11,995 |
| 2020 | $18,162 | $12,125 |
| 2021* | $18,329 | $12,252 |
| 2022* | $18,498 | $12,381 |
| 2023* | $18,668 | $12,511 |
| 2024* | $18,840 | $12,642 |
| 2025* | $19,013 | $12,775 |