| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $64,363 | $26,249 |
| 2016 | $66,549 | $25,679 |
| 2017 | $68,846 | $24,124 |
| 2018 | $68,846 | $22,741 |
| 2019 | $73,932 | $22,524 |
| 2020 | $73,689 | $22,281 |
| 2021* | $76,194 | $21,798 |
| 2022* | $78,785 | $21,324 |
| 2023* | $81,464 | $20,862 |
| 2024* | $84,233 | $20,409 |
| 2025* | $87,097 | $19,966 |