| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,724 | $16,380 |
| 2016 | $21,976 | $15,526 |
| 2017 | $22,612 | $15,227 |
| 2018 | $22,612 | $13,550 |
| 2019 | $22,782 | $14,111 |
| 2020 | $23,252 | $14,581 |
| 2021* | $23,426 | $14,300 |
| 2022* | $23,602 | $14,024 |
| 2023* | $23,779 | $13,753 |
| 2024* | $23,957 | $13,488 |
| 2025* | $24,137 | $13,227 |
