| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,695 | $16,170 |
| 2016 | $23,083 | $15,519 |
| 2017 | $21,306 | $13,231 |
| 2018 | $21,306 | $12,407 |
| 2019 | $24,162 | $15,451 |
| 2020 | $25,067 | $16,356 |
| 2021* | $25,067 | $15,697 |
| 2022* | $25,067 | $15,064 |
| 2023* | $25,067 | $14,457 |
| 2024* | $25,067 | $13,875 |
| 2025* | $25,067 | $13,315 |