| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,084 | $10,634 |
| 2016 | $14,492 | $11,047 |
| 2017 | $12,892 | $9,274 |
| 2018 | $12,892 | $9,492 |
| 2019 | $12,436 | $8,871 |
| 2020 | $11,812 | $8,247 |
| 2021* | $11,394 | $7,708 |
| 2022* | $10,991 | $7,204 |
| 2023* | $10,601 | $6,732 |
| 2024* | $10,226 | $6,292 |
| 2025* | $9,864 | $5,881 |