| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,340 | $12,431 |
| 2016 | $33,502 | $23,394 |
| 2017 | $33,954 | $22,188 |
| 2018 | $33,954 | $21,522 |
| 2019 | $35,813 | $22,328 |
| 2020 | $37,208 | $23,723 |
| 2021* | $37,710 | $24,613 |
| 2022* | $38,219 | $25,536 |
| 2023* | $38,735 | $26,493 |
| 2024* | $39,258 | $27,487 |
| 2025* | $39,788 | $28,517 |