| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,350 | $14,472 |
| 2016 | $23,460 | $14,288 |
| 2017 | $23,922 | $12,422 |
| 2018 | $23,922 | $12,350 |
| 2019 | $24,680 | $12,642 |
| 2020 | $24,860 | $12,822 |
| 2021* | $25,041 | $12,748 |
| 2022* | $25,224 | $12,674 |
| 2023* | $25,408 | $12,600 |
| 2024* | $25,594 | $12,527 |
| 2025* | $25,781 | $12,454 |