| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,248 | $19,122 |
| 2016 | $29,030 | $19,599 |
| 2017 | $30,006 | $19,149 |
| 2018 | $30,006 | $19,233 |
| 2019 | $32,560 | $20,164 |
| 2020 | $33,356 | $20,960 |
| 2021* | $34,280 | $21,482 |
| 2022* | $35,230 | $22,017 |
| 2023* | $36,205 | $22,565 |
| 2024* | $37,208 | $23,127 |
| 2025* | $38,239 | $23,703 |