| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,700 | $20,957 |
| 2016 | $34,800 | $21,262 |
| 2017 | $36,000 | $21,634 |
| 2018 | $36,000 | $21,685 |
| 2019 | $38,500 | $22,267 |
| 2020 | $39,880 | $23,647 |
| 2021* | $41,256 | $24,061 |
| 2022* | $42,679 | $24,482 |
| 2023* | $44,152 | $24,910 |
| 2024* | $45,675 | $25,346 |
| 2025* | $47,251 | $25,790 |