| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,860 | $7,356 |
| 2016 | $15,420 | $7,714 |
| 2017 | $15,865 | $10,192 |
| 2018 | $15,865 | $10,934 |
| 2019 | $16,720 | $13,247 |
| 2020 | $16,928 | $13,455 |
| 2021* | $17,417 | $14,435 |
| 2022* | $17,921 | $15,485 |
| 2023* | $18,438 | $16,613 |
| 2024* | $18,971 | $17,822 |
| 2025* | $19,520 | $19,120 |