| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,578 | $20,621 |
| 2016 | $37,156 | $20,572 |
| 2017 | $37,296 | $22,572 |
| 2018 | $37,296 | $19,673 |
| 2019 | $38,974 | $23,770 |
| 2020 | $39,398 | $24,194 |
| 2021* | $39,827 | $24,625 |
| 2022* | $40,262 | $25,063 |
| 2023* | $40,700 | $25,509 |
| 2024* | $41,144 | $25,963 |
| 2025* | $41,593 | $26,425 |