| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,488 | $9,014 |
| 2016 | $16,451 | $10,856 |
| 2017 | $16,601 | $11,338 |
| 2018 | $16,601 | $11,451 |
| 2019 | $17,289 | $11,265 |
| 2020 | $17,384 | $11,360 |
| 2021* | $17,542 | $11,474 |
| 2022* | $17,702 | $11,588 |
| 2023* | $17,863 | $11,704 |
| 2024* | $18,025 | $11,821 |
| 2025* | $18,189 | $11,939 |