| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $38,180 | $23,544 |
| 2016 | $39,600 | $24,268 |
| 2017 | $38,942 | $23,371 |
| 2018 | $38,942 | $22,229 |
| 2019 | $39,558 | $21,829 |
| 2020 | $40,270 | $22,541 |
| 2021* | $40,906 | $22,135 |
| 2022* | $41,553 | $21,737 |
| 2023* | $42,209 | $21,346 |
| 2024* | $42,876 | $20,961 |
| 2025* | $43,553 | $20,584 |