| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,540 | $32,051 |
| 2016 | $36,712 | $31,989 |
| 2017 | $34,948 | $28,176 |
| 2018 | $34,948 | $29,027 |
| 2019 | $36,728 | $29,310 |
| 2020 | $37,508 | $30,090 |
| 2021* | $37,684 | $30,382 |
| 2022* | $37,861 | $30,677 |
| 2023* | $38,039 | $30,974 |
| 2024* | $38,218 | $31,275 |
| 2025* | $38,398 | $31,578 |