| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $35,240 | $20,699 |
| 2016 | $36,150 | $19,411 |
| 2017 | $37,270 | $19,947 |
| 2018 | $37,270 | $19,655 |
| 2019 | $38,820 | $18,352 |
| 2020 | $39,120 | $18,652 |
| 2021* | $40,129 | $18,380 |
| 2022* | $41,165 | $18,111 |
| 2023* | $42,227 | $17,847 |
| 2024* | $43,316 | $17,586 |
| 2025* | $44,434 | $17,330 |