| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,700 | $10,816 |
| 2016 | $17,700 | $11,826 |
| 2017 | $17,875 | $13,599 |
| 2018 | $17,875 | $11,896 |
| 2019 | $18,000 | $11,139 |
| 2020 | $18,500 | $11,639 |
| 2021* | $18,630 | $12,162 |
| 2022* | $18,760 | $12,708 |
| 2023* | $18,891 | $13,278 |
| 2024* | $19,023 | $13,874 |
| 2025* | $19,157 | $14,497 |