| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,590 | $16,950 |
| 2016 | $27,070 | $17,454 |
| 2017 | $27,410 | $17,353 |
| 2018 | $27,410 | $17,576 |
| 2019 | $27,540 | $18,815 |
| 2020 | $27,540 | $18,815 |
| 2021* | $27,669 | $19,058 |
| 2022* | $27,799 | $19,304 |
| 2023* | $27,930 | $19,553 |
| 2024* | $28,061 | $19,805 |
| 2025* | $28,193 | $20,060 |