| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,148 | $9,378 |
| 2016 | $15,207 | $9,869 |
| 2017 | $15,915 | $11,423 |
| 2018 | $15,915 | $10,778 |
| 2019 | $14,948 | $9,371 |
| 2020 | $15,106 | $9,529 |
| 2021* | $15,266 | $9,690 |
| 2022* | $15,428 | $9,854 |
| 2023* | $15,591 | $10,020 |
| 2024* | $15,757 | $10,190 |
| 2025* | $15,924 | $10,362 |
