| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $42,290 | $20,102 |
| 2016 | $43,415 | $22,507 |
| 2017 | $44,574 | $22,832 |
| 2018 | $44,574 | $20,812 |
| 2019 | $46,384 | $26,730 |
| 2020 | $44,591 | $24,937 |
| 2021* | $45,777 | $25,296 |
| 2022* | $46,995 | $25,660 |
| 2023* | $48,245 | $26,030 |
| 2024* | $49,528 | $26,405 |
| 2025* | $50,846 | $26,785 |