| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,236 | $23,202 |
| 2016 | $21,769 | $18,711 |
| 2017 | $20,897 | $18,844 |
| 2018 | $20,897 | $14,791 |
| 2019 | $20,897 | $16,376 |
| 2020 | $20,752 | $16,231 |
| 2021* | $20,609 | $16,087 |
| 2022* | $20,467 | $15,943 |
| 2023* | $20,325 | $15,801 |
| 2024* | $20,185 | $15,661 |
| 2025* | $20,046 | $15,521 |
