| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $55,770 | $35,035 |
| 2016 | $57,740 | $35,008 |
| 2017 | $59,700 | $34,878 |
| 2018 | $59,700 | $33,934 |
| 2019 | $63,850 | $33,800 |
| 2020 | $65,360 | $35,310 |
| 2021* | $67,576 | $35,179 |
| 2022* | $69,867 | $35,049 |
| 2023* | $72,235 | $34,920 |
| 2024* | $74,684 | $34,790 |
| 2025* | $77,216 | $34,662 |