| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,115 | $13,586 |
| 2016 | $21,358 | $12,866 |
| 2017 | $21,678 | $13,839 |
| 2018 | $21,678 | $14,763 |
| 2019 | $23,413 | $13,874 |
| 2020 | $22,364 | $12,825 |
| 2021* | $22,621 | $12,145 |
| 2022* | $22,881 | $11,502 |
| 2023* | $23,144 | $10,892 |
| 2024* | $23,411 | $10,315 |
| 2025* | $23,680 | $9,768 |
