| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,060 | $28,388 |
| 2016 | $35,096 | $30,078 |
| 2017 | $32,960 | $27,105 |
| 2018 | $32,960 | $27,939 |
| 2019 | $34,517 | $30,707 |
| 2020 | $35,024 | $31,214 |
| 2021* | $35,059 | $32,175 |
| 2022* | $35,094 | $33,166 |
| 2023* | $35,129 | $34,188 |
| 2024* | $35,164 | $35,241 |
| 2025* | $35,199 | $36,326 |