| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,794 | $22,162 |
| 2016 | $30,458 | $22,115 |
| 2017 | $31,282 | $22,281 |
| 2018 | $31,282 | $22,252 |
| 2019 | $32,196 | $22,915 |
| 2020 | $32,678 | $23,397 |
| 2021* | $33,407 | $23,572 |
| 2022* | $34,152 | $23,749 |
| 2023* | $34,913 | $23,927 |
| 2024* | $35,692 | $24,107 |
| 2025* | $36,488 | $24,288 |