| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $27,737 | $19,693 |
| 2016 | $27,217 | $19,060 |
| 2017 | $27,552 | $19,225 |
| 2018 | $27,552 | $18,302 |
| 2019 | $29,885 | $20,270 |
| 2020 | $31,886 | $22,271 |
| 2021* | $32,278 | $22,465 |
| 2022* | $32,675 | $22,660 |
| 2023* | $33,077 | $22,857 |
| 2024* | $33,484 | $23,056 |
| 2025* | $33,896 | $23,257 |
