| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,060 | $29,415 |
| 2016 | $35,096 | $29,840 |
| 2017 | $33,212 | $28,877 |
| 2018 | $33,212 | $27,135 |
| 2019 | $34,659 | $28,905 |
| 2020 | $35,108 | $29,354 |
| 2021* | $35,143 | $29,777 |
| 2022* | $35,178 | $30,205 |
| 2023* | $35,213 | $30,640 |
| 2024* | $35,249 | $31,082 |
| 2025* | $35,284 | $31,529 |