| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,190 | $16,049 |
| 2016 | $22,615 | $16,360 |
| 2017 | $23,337 | $17,266 |
| 2018 | $23,337 | $16,581 |
| 2019 | $24,967 | $16,019 |
| 2020 | $25,197 | $16,249 |
| 2021* | $25,681 | $16,483 |
| 2022* | $26,174 | $16,720 |
| 2023* | $26,676 | $16,961 |
| 2024* | $27,189 | $17,205 |
| 2025* | $27,711 | $17,453 |