| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,688 | $31,351 |
| 2016 | $40,578 | $30,908 |
| 2017 | $41,572 | $34,231 |
| 2018 | $41,572 | $33,475 |
| 2019 | $44,967 | $33,519 |
| 2020 | $44,405 | $32,957 |
| 2021* | $45,493 | $32,492 |
| 2022* | $46,607 | $32,034 |
| 2023* | $47,749 | $31,582 |
| 2024* | $48,919 | $31,137 |
| 2025* | $50,118 | $30,698 |