| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,446 | $27,175 |
| 2016 | $43,503 | $27,591 |
| 2017 | $44,838 | $27,173 |
| 2018 | $44,838 | $26,908 |
| 2019 | $47,438 | $28,230 |
| 2020 | $48,714 | $29,506 |
| 2021* | $50,024 | $29,957 |
| 2022* | $51,370 | $30,416 |
| 2023* | $52,752 | $30,881 |
| 2024* | $54,171 | $31,354 |
| 2025* | $55,628 | $31,833 |