| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,666 | $20,746 |
| 2016 | $34,816 | $20,276 |
| 2017 | $34,400 | $20,658 |
| 2018 | $34,400 | $18,811 |
| 2019 | $36,651 | $19,697 |
| 2020 | $37,475 | $20,521 |
| 2021* | $38,318 | $20,907 |
| 2022* | $39,180 | $21,300 |
| 2023* | $40,062 | $21,700 |
| 2024* | $40,963 | $22,108 |
| 2025* | $41,885 | $22,524 |
