| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $43,496 | $23,055 |
| 2016 | $44,546 | $23,013 |
| 2017 | $45,670 | $22,625 |
| 2018 | $45,670 | $22,744 |
| 2019 | $46,811 | $22,163 |
| 2020 | $47,595 | $22,947 |
| 2021* | $48,742 | $22,906 |
| 2022* | $49,917 | $22,864 |
| 2023* | $51,120 | $22,823 |
| 2024* | $52,352 | $22,782 |
| 2025* | $53,613 | $22,741 |