| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $13,767 | $9,021 |
| 2016 | $14,815 | $9,807 |
| 2017 | $15,122 | $10,155 |
| 2018 | $15,122 | $10,132 |
| 2019 | $15,552 | $10,495 |
| 2020 | $15,552 | $10,495 |
| 2021* | $15,874 | $10,868 |
| 2022* | $16,203 | $11,253 |
| 2023* | $16,538 | $11,653 |
| 2024* | $16,880 | $12,067 |
| 2025* | $17,230 | $12,495 |