| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,899 | $32,122 |
| 2016 | $31,141 | $25,947 |
| 2017 | $32,508 | $25,389 |
| 2018 | $32,508 | $25,079 |
| 2019 | $37,405 | $30,576 |
| 2020 | $37,418 | $30,589 |
| 2021* | $37,429 | $30,216 |
| 2022* | $37,440 | $29,847 |
| 2023* | $37,452 | $29,483 |
| 2024* | $37,463 | $29,123 |
| 2025* | $37,474 | $28,768 |