| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $48,600 | $29,549 |
| 2016 | $50,500 | $31,980 |
| 2017 | $51,400 | $32,835 |
| 2018 | $51,400 | $32,161 |
| 2019 | $53,565 | $30,430 |
| 2020 | $54,090 | $30,955 |
| 2021* | $55,053 | $31,491 |
| 2022* | $56,033 | $32,035 |
| 2023* | $57,030 | $32,590 |
| 2024* | $58,045 | $33,153 |
| 2025* | $59,078 | $33,727 |