| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,042 | $21,602 |
| 2016 | $37,232 | $20,765 |
| 2017 | $38,936 | $23,264 |
| 2018 | $38,936 | $21,864 |
| 2019 | $42,116 | $22,414 |
| 2020 | $43,448 | $23,746 |
| 2021* | $44,882 | $24,344 |
| 2022* | $46,363 | $24,958 |
| 2023* | $47,893 | $25,587 |
| 2024* | $49,473 | $26,232 |
| 2025* | $51,106 | $26,893 |