| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $41,100 | $23,941 |
| 2016 | $42,500 | $24,295 |
| 2017 | $43,400 | $24,622 |
| 2018 | $43,400 | $25,494 |
| 2019 | $45,400 | $22,793 |
| 2020 | $46,200 | $23,593 |
| 2021* | $47,179 | $23,942 |
| 2022* | $48,180 | $24,297 |
| 2023* | $49,201 | $24,656 |
| 2024* | $50,244 | $25,021 |
| 2025* | $51,309 | $25,391 |