| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,157 | $19,431 |
| 2016 | $32,082 | $20,978 |
| 2017 | $33,876 | $22,728 |
| 2018 | $33,876 | $20,267 |
| 2019 | $35,029 | $20,641 |
| 2020 | $35,151 | $20,763 |
| 2021* | $36,195 | $21,147 |
| 2022* | $37,270 | $21,538 |
| 2023* | $38,377 | $21,937 |
| 2024* | $39,517 | $22,343 |
| 2025* | $40,690 | $22,756 |