| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,700 | $18,033 |
| 2016 | $27,928 | $18,944 |
| 2017 | $29,530 | $20,272 |
| 2018 | $29,530 | $20,143 |
| 2019 | $30,928 | $19,421 |
| 2020 | $31,546 | $20,039 |
| 2021* | $32,997 | $20,676 |
| 2022* | $34,515 | $21,334 |
| 2023* | $36,103 | $22,012 |
| 2024* | $37,763 | $22,712 |
| 2025* | $39,501 | $23,434 |
