| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,060 | $28,050 |
| 2016 | $35,096 | $28,831 |
| 2017 | $33,016 | $27,508 |
| 2018 | $33,016 | $27,457 |
| 2019 | $34,515 | $28,686 |
| 2020 | $35,108 | $29,279 |
| 2021* | $35,143 | $29,885 |
| 2022* | $35,178 | $30,504 |
| 2023* | $35,213 | $31,135 |
| 2024* | $35,249 | $31,780 |
| 2025* | $35,284 | $32,437 |