| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $52,402 | $33,908 |
| 2016 | $54,481 | $35,562 |
| 2017 | $56,275 | $37,190 |
| 2018 | $56,275 | $35,888 |
| 2019 | $59,406 | $35,319 |
| 2020 | $59,793 | $35,706 |
| 2021* | $61,760 | $36,099 |
| 2022* | $63,792 | $36,496 |
| 2023* | $65,891 | $36,897 |
| 2024* | $68,059 | $37,303 |
| 2025* | $70,298 | $37,714 |