| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,473 | $23,458 |
| 2016 | $27,771 | $23,438 |
| 2017 | $28,131 | $23,003 |
| 2018 | $28,131 | $24,582 |
| 2019 | $34,470 | $31,492 |
| 2020 | $30,600 | $27,622 |
| 2021* | $30,930 | $27,597 |
| 2022* | $31,265 | $27,572 |
| 2023* | $31,602 | $27,547 |
| 2024* | $31,943 | $27,523 |
| 2025* | $32,288 | $27,498 |