| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,442 | $18,751 |
| 2016 | $25,775 | $19,161 |
| 2017 | $26,356 | $19,915 |
| 2018 | $26,356 | $19,595 |
| 2019 | $27,218 | $19,986 |
| 2020 | $27,526 | $20,294 |
| 2021* | $27,887 | $20,700 |
| 2022* | $28,252 | $21,114 |
| 2023* | $28,622 | $21,536 |
| 2024* | $28,997 | $21,967 |
| 2025* | $29,377 | $22,406 |
