| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,436 | $24,856 |
| 2016 | $28,665 | $23,452 |
| 2017 | $28,815 | $23,040 |
| 2018 | $28,815 | $23,000 |
| 2019 | $29,670 | $25,450 |
| 2020 | $29,880 | $25,660 |
| 2021* | $30,092 | $25,616 |
| 2022* | $30,306 | $25,573 |
| 2023* | $30,521 | $25,529 |
| 2024* | $30,738 | $25,486 |
| 2025* | $30,956 | $25,443 |