| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $11,918 | $6,895 |
| 2016 | $12,176 | $7,071 |
| 2017 | $12,448 | $7,593 |
| 2018 | $12,448 | $7,472 |
| 2019 | $13,163 | $7,536 |
| 2020 | $13,406 | $7,779 |
| 2021* | $13,696 | $7,977 |
| 2022* | $13,991 | $8,181 |
| 2023* | $14,294 | $8,389 |
| 2024* | $14,602 | $8,603 |
| 2025* | $14,918 | $8,823 |