| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $55,250 | $31,739 |
| 2016 | $56,920 | $33,689 |
| 2017 | $58,240 | $33,263 |
| 2018 | $58,240 | $31,580 |
| 2019 | $61,100 | $33,197 |
| 2020 | $59,769 | $31,866 |
| 2021* | $61,156 | $31,464 |
| 2022* | $62,574 | $31,068 |
| 2023* | $64,026 | $30,677 |
| 2024* | $65,512 | $30,290 |
| 2025* | $67,031 | $29,908 |