| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,700 | $25,351 |
| 2016 | $35,608 | $26,002 |
| 2017 | $41,000 | $32,254 |
| 2018 | $41,000 | $22,314 |
| 2019 | $42,300 | $21,778 |
| 2020 | $43,450 | $22,928 |
| 2021* | $44,632 | $23,517 |
| 2022* | $45,846 | $24,122 |
| 2023* | $47,093 | $24,742 |
| 2024* | $48,374 | $25,377 |
| 2025* | $49,690 | $26,030 |