| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,756 | $20,236 |
| 2016 | $30,386 | $21,057 |
| 2017 | $30,896 | $21,309 |
| 2018 | $30,896 | $21,048 |
| 2019 | $32,179 | $22,201 |
| 2020 | $29,888 | $19,910 |
| 2021* | $30,390 | $20,149 |
| 2022* | $30,901 | $20,391 |
| 2023* | $31,420 | $20,635 |
| 2024* | $31,948 | $20,883 |
| 2025* | $32,484 | $21,134 |