| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $56,510 | $24,389 |
| 2016 | $57,870 | $26,658 |
| 2017 | $58,670 | $24,727 |
| 2018 | $58,670 | $21,683 |
| 2019 | $61,265 | $24,497 |
| 2020 | $62,788 | $26,020 |
| 2021* | $64,301 | $27,638 |
| 2022* | $65,851 | $29,358 |
| 2023* | $67,438 | $31,184 |
| 2024* | $69,063 | $33,123 |
| 2025* | $70,728 | $35,183 |