| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,860 | $23,958 |
| 2016 | $39,468 | $23,359 |
| 2017 | $41,170 | $25,415 |
| 2018 | $41,170 | $23,615 |
| 2019 | $44,470 | $23,931 |
| 2020 | $45,459 | $24,920 |
| 2021* | $47,391 | $25,254 |
| 2022* | $49,405 | $25,592 |
| 2023* | $51,505 | $25,935 |
| 2024* | $53,694 | $26,283 |
| 2025* | $55,976 | $26,635 |