| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,914 | $19,023 |
| 2016 | $27,624 | $20,303 |
| 2017 | $28,302 | $19,671 |
| 2018 | $28,302 | $19,198 |
| 2019 | $29,508 | $20,397 |
| 2020 | $30,043 | $20,932 |
| 2021* | $30,779 | $21,480 |
| 2022* | $31,533 | $22,043 |
| 2023* | $32,306 | $22,621 |
| 2024* | $33,097 | $23,213 |
| 2025* | $33,908 | $23,822 |