| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,290 | $12,743 |
| 2016 | $19,966 | $14,407 |
| 2017 | $25,432 | $18,526 |
| 2018 | $25,432 | $18,603 |
| 2019 | $26,822 | $19,573 |
| 2020 | $28,333 | $21,084 |
| 2021* | $29,928 | $22,712 |
| 2022* | $31,613 | $24,465 |
| 2023* | $33,393 | $26,354 |
| 2024* | $35,273 | $28,388 |
| 2025* | $37,259 | $30,580 |