| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $53,960 | $28,028 |
| 2016 | $55,770 | $28,913 |
| 2017 | $57,627 | $29,610 |
| 2018 | $57,627 | $28,133 |
| 2019 | $61,160 | $25,577 |
| 2020 | $62,989 | $27,406 |
| 2021* | $65,087 | $28,066 |
| 2022* | $67,254 | $28,743 |
| 2023* | $69,493 | $29,436 |
| 2024* | $71,808 | $30,145 |
| 2025* | $74,199 | $30,871 |