| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,544 | $29,434 |
| 2016 | $29,004 | $28,439 |
| 2017 | $28,626 | N/A |
| 2018 | $28,626 | $25,718 |
| 2019 | $28,284 | $24,728 |
| 2020 | $25,041 | $21,485 |
| 2021* | $24,715 | $20,658 |
| 2022* | $24,394 | $19,863 |
| 2023* | $24,077 | $19,098 |
| 2024* | $23,764 | $18,363 |
| 2025* | $23,455 | $17,656 |
