| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,199 | $27,641 |
| 2016 | $33,781 | $28,925 |
| 2017 | $28,503 | $23,124 |
| 2018 | $28,503 | $22,632 |
| 2019 | $31,292 | $24,484 |
| 2020 | $31,954 | $25,146 |
| 2021* | $32,631 | $25,825 |
| 2022* | $33,323 | $26,522 |
| 2023* | $34,030 | $27,238 |
| 2024* | $34,751 | $27,974 |
| 2025* | $35,488 | $28,729 |
