| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,536 | $14,776 |
| 2016 | $19,536 | $14,409 |
| 2017 | $19,824 | $14,392 |
| 2018 | $19,824 | $14,513 |
| 2019 | $21,066 | $13,473 |
| 2020 | $21,326 | $13,733 |
| 2021* | $21,588 | $13,717 |
| 2022* | $21,854 | $13,700 |
| 2023* | $22,123 | $13,684 |
| 2024* | $22,395 | $13,667 |
| 2025* | $22,670 | $13,651 |