| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,726 | $23,568 |
| 2016 | $32,426 | $23,474 |
| 2017 | $32,880 | $24,109 |
| 2018 | $32,880 | $22,220 |
| 2019 | $33,528 | $23,553 |
| 2020 | $33,888 | $23,913 |
| 2021* | $34,362 | $24,279 |
| 2022* | $34,844 | $24,650 |
| 2023* | $35,331 | $25,027 |
| 2024* | $35,826 | $25,410 |
| 2025* | $36,328 | $25,799 |