| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,220 | $7,144 |
| 2016 | $17,342 | $7,609 |
| 2017 | $17,783 | $10,147 |
| 2018 | $17,783 | $10,518 |
| 2019 | $17,684 | $10,708 |
| 2020 | $17,828 | $10,852 |
| 2021* | $17,955 | $11,249 |
| 2022* | $18,082 | $11,661 |
| 2023* | $18,210 | $12,088 |
| 2024* | $18,340 | $12,530 |
| 2025* | $18,470 | $12,989 |