| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,568 | $13,436 |
| 2016 | $21,220 | $14,348 |
| 2017 | $21,642 | $14,348 |
| 2018 | $21,642 | $14,054 |
| 2019 | $24,650 | $17,443 |
| 2020 | $25,170 | $17,963 |
| 2021* | $25,701 | $18,498 |
| 2022* | $26,243 | $19,050 |
| 2023* | $26,797 | $19,617 |
| 2024* | $27,363 | $20,202 |
| 2025* | $27,940 | $20,804 |
