| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,544 | $26,251 |
| 2016 | $29,004 | $24,477 |
| 2017 | $28,626 | $24,876 |
| 2018 | $28,626 | $24,210 |
| 2019 | $28,284 | $20,884 |
| 2020 | $25,041 | $17,641 |
| 2021* | $24,715 | $16,448 |
| 2022* | $24,394 | $15,337 |
| 2023* | $24,077 | $14,300 |
| 2024* | $23,764 | $13,333 |
| 2025* | $23,455 | $12,432 |
