| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,286 | $23,612 |
| 2016 | $31,785 | $26,634 |
| 2017 | $32,471 | $27,332 |
| 2018 | $32,471 | $25,368 |
| 2019 | $37,986 | $29,779 |
| 2020 | $38,746 | $30,539 |
| 2021* | $39,521 | $31,339 |
| 2022* | $40,311 | $32,160 |
| 2023* | $41,118 | $33,003 |
| 2024* | $41,940 | $33,867 |
| 2025* | $42,779 | $34,755 |