| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $39,667 | $19,570 |
| 2016 | $38,806 | $18,370 |
| 2017 | $39,621 | $17,829 |
| 2018 | $39,621 | $19,595 |
| 2019 | $42,288 | $21,048 |
| 2020 | $43,906 | $22,666 |
| 2021* | $44,828 | $24,348 |
| 2022* | $45,769 | $26,154 |
| 2023* | $46,731 | $28,095 |
| 2024* | $47,712 | $30,180 |
| 2025* | $48,714 | $32,419 |