| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,427 | $17,654 |
| 2016 | $21,795 | $17,800 |
| 2017 | $21,769 | $17,649 |
| 2018 | $21,769 | $17,130 |
| 2019 | $22,304 | $17,231 |
| 2020 | $22,630 | $17,557 |
| 2021* | $22,960 | $17,661 |
| 2022* | $23,296 | $17,765 |
| 2023* | $23,636 | $17,870 |
| 2024* | $23,981 | $17,975 |
| 2025* | $24,331 | $18,081 |
