| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,016 | $12,934 |
| 2016 | $22,669 | $11,747 |
| 2017 | $23,448 | $11,084 |
| 2018 | $23,448 | $10,939 |
| 2019 | $25,408 | $13,496 |
| 2020 | $25,664 | $13,752 |
| 2021* | $26,426 | $13,572 |
| 2022* | $27,211 | $13,394 |
| 2023* | $28,019 | $13,219 |
| 2024* | $28,851 | $13,045 |
| 2025* | $29,708 | $12,875 |