| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,900 | $20,192 |
| 2016 | $27,331 | $20,406 |
| 2017 | $28,120 | $20,993 |
| 2018 | $28,120 | $20,868 |
| 2019 | $28,855 | $21,195 |
| 2020 | $28,186 | $20,526 |
| 2021* | $28,637 | $20,744 |
| 2022* | $29,095 | $20,963 |
| 2023* | $29,561 | $21,186 |
| 2024* | $30,034 | $21,410 |
| 2025* | $30,514 | $21,637 |
