| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,850 | $17,608 |
| 2016 | $26,750 | $18,006 |
| 2017 | $28,260 | $17,881 |
| 2018 | $28,260 | $17,495 |
| 2019 | $30,810 | $18,152 |
| 2020 | $31,650 | $18,992 |
| 2021* | $32,751 | $19,421 |
| 2022* | $33,891 | $19,860 |
| 2023* | $35,071 | $20,309 |
| 2024* | $36,291 | $20,768 |
| 2025* | $37,554 | $21,237 |