| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $56,133 | $50,600 |
| 2016 | $56,646 | $49,628 |
| 2017 | $50,353 | $45,766 |
| 2018 | $50,353 | $44,158 |
| 2019 | $51,660 | $43,831 |
| 2020 | $53,185 | $45,356 |
| 2021* | $53,669 | $44,485 |
| 2022* | $54,157 | $43,631 |
| 2023* | $54,650 | $42,793 |
| 2024* | $55,148 | $41,972 |
| 2025* | $55,649 | $41,166 |