| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,278 | $13,747 |
| 2016 | $22,625 | $13,820 |
| 2017 | $22,605 | $13,560 |
| 2018 | $22,605 | $13,630 |
| 2019 | $23,933 | $14,845 |
| 2020 | $24,540 | $15,452 |
| 2021* | $24,923 | $15,534 |
| 2022* | $25,312 | $15,616 |
| 2023* | $25,706 | $15,699 |
| 2024* | $26,108 | $15,782 |
| 2025* | $26,515 | $15,866 |
