| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,186 | $12,224 |
| 2016 | $21,278 | $13,492 |
| 2017 | $22,326 | $13,823 |
| 2018 | $22,326 | $13,945 |
| 2019 | $22,832 | $13,267 |
| 2020 | $22,932 | $13,367 |
| 2021* | $23,453 | $13,485 |
| 2022* | $23,985 | $13,603 |
| 2023* | $24,529 | $13,723 |
| 2024* | $25,086 | $13,844 |
| 2025* | $25,656 | $13,966 |
