| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,131 | $22,767 |
| 2016 | $30,783 | $23,233 |
| 2017 | $31,734 | $24,234 |
| 2018 | $31,734 | $23,805 |
| 2019 | $33,053 | $24,887 |
| 2020 | $33,644 | $25,478 |
| 2021* | $34,371 | $26,082 |
| 2022* | $35,113 | $26,700 |
| 2023* | $35,872 | $27,333 |
| 2024* | $36,646 | $27,981 |
| 2025* | $37,438 | $28,644 |