| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,360 | $21,460 |
| 2016 | $30,178 | $20,447 |
| 2017 | $30,924 | $18,667 |
| 2018 | $30,924 | $17,227 |
| 2019 | $33,168 | $23,000 |
| 2020 | $34,666 | $24,498 |
| 2021* | $35,633 | $23,342 |
| 2022* | $36,627 | $22,240 |
| 2023* | $37,649 | $21,190 |
| 2024* | $38,700 | $20,190 |
| 2025* | $39,779 | $19,237 |