| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,816 | $9,613 |
| 2016 | $17,804 | $12,593 |
| 2017 | $17,804 | $12,824 |
| 2018 | $17,804 | $11,894 |
| 2019 | $19,866 | $17,457 |
| 2020 | $22,278 | $19,869 |
| 2021* | $24,858 | $22,615 |
| 2022* | $27,736 | $25,740 |
| 2023* | $30,948 | $29,298 |
| 2024* | $34,532 | $33,347 |
| 2025* | $38,531 | $37,955 |