| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $13,767 | $8,848 |
| 2016 | $14,815 | $9,572 |
| 2017 | $15,122 | $9,527 |
| 2018 | $15,122 | $9,585 |
| 2019 | $15,552 | $10,347 |
| 2020 | $15,552 | $10,347 |
| 2021* | $15,874 | $10,410 |
| 2022* | $16,203 | $10,474 |
| 2023* | $16,538 | $10,538 |
| 2024* | $16,880 | $10,602 |
| 2025* | $17,230 | $10,666 |