| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,544 | $23,899 |
| 2016 | $29,004 | $25,074 |
| 2017 | $28,626 | $22,851 |
| 2018 | $28,626 | N/A |
| 2019 | $28,284 | $22,189 |
| 2020 | $25,041 | $18,946 |
| 2021* | $24,715 | $17,265 |
| 2022* | $24,394 | $15,734 |
| 2023* | $24,077 | $14,338 |
| 2024* | $23,764 | $13,067 |
| 2025* | $23,455 | $11,908 |
