| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,195 | $16,572 |
| 2016 | $23,664 | $17,399 |
| 2017 | $24,136 | $17,922 |
| 2018 | $24,136 | $17,674 |
| 2019 | $24,360 | $17,340 |
| 2020 | $24,491 | $17,471 |
| 2021* | $24,719 | $17,604 |
| 2022* | $24,949 | $17,738 |
| 2023* | $25,181 | $17,872 |
| 2024* | $25,415 | $18,008 |
| 2025* | $25,651 | $18,145 |
