| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,102 | $17,846 |
| 2016 | $27,426 | $15,936 |
| 2017 | $26,854 | $21,306 |
| 2018 | $26,854 | $20,814 |
| 2019 | $29,036 | $21,042 |
| 2020 | $29,476 | $21,482 |
| 2021* | $29,830 | $21,718 |
| 2022* | $30,188 | $21,957 |
| 2023* | $30,550 | $22,199 |
| 2024* | $30,917 | $22,443 |
| 2025* | $31,288 | $22,690 |