| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,612 | $16,768 |
| 2016 | $24,864 | $17,267 |
| 2017 | $26,122 | $17,773 |
| 2018 | $26,122 | $17,566 |
| 2019 | $28,182 | $19,769 |
| 2020 | $28,780 | $20,367 |
| 2021* | $29,390 | $20,974 |
| 2022* | $30,013 | $21,599 |
| 2023* | $30,649 | $22,243 |
| 2024* | $31,299 | $22,905 |
| 2025* | $31,963 | $23,588 |
