| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,732 | $26,216 |
| 2016 | $38,626 | $25,871 |
| 2017 | $39,714 | $25,084 |
| 2018 | $39,714 | $22,905 |
| 2019 | $41,658 | $24,172 |
| 2020 | $42,748 | $25,262 |
| 2021* | $43,868 | $24,929 |
| 2022* | $45,017 | $24,599 |
| 2023* | $46,197 | $24,275 |
| 2024* | $47,407 | $23,954 |
| 2025* | $48,649 | $23,638 |