| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $39,991 | $25,099 |
| 2016 | $40,089 | $25,724 |
| 2017 | $42,253 | $27,635 |
| 2018 | $42,253 | $27,131 |
| 2019 | $44,499 | $22,373 |
| 2020 | $46,070 | $23,944 |
| 2021* | $47,696 | $24,540 |
| 2022* | $49,380 | $25,151 |
| 2023* | $51,123 | $25,778 |
| 2024* | $52,928 | $26,419 |
| 2025* | $54,796 | $27,077 |