| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,450 | $17,375 |
| 2016 | $27,020 | $17,235 |
| 2017 | $28,070 | $17,716 |
| 2018 | $28,070 | $16,892 |
| 2019 | $29,820 | $17,396 |
| 2020 | $30,070 | $17,646 |
| 2021* | $30,720 | $17,900 |
| 2022* | $31,383 | $18,158 |
| 2023* | $32,061 | $18,419 |
| 2024* | $32,753 | $18,685 |
| 2025* | $33,461 | $18,954 |