| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,198 | $12,560 |
| 2016 | $22,367 | $15,481 |
| 2017 | $28,082 | $20,859 |
| 2018 | $28,082 | $20,366 |
| 2019 | $28,403 | $19,992 |
| 2020 | $28,347 | $19,936 |
| 2021* | $28,562 | $19,880 |
| 2022* | $28,780 | $19,825 |
| 2023* | $28,998 | $19,769 |
| 2024* | $29,219 | $19,714 |
| 2025* | $29,441 | $19,658 |
