| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,950 | $18,030 |
| 2016 | $37,801 | $19,297 |
| 2017 | $36,570 | $17,943 |
| 2018 | $36,570 | $17,777 |
| 2019 | $37,860 | $21,354 |
| 2020 | $38,890 | $22,384 |
| 2021* | $39,784 | $23,463 |
| 2022* | $40,700 | $24,594 |
| 2023* | $41,636 | $25,779 |
| 2024* | $42,593 | $27,022 |
| 2025* | $43,573 | $28,324 |