| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $32,138 | $23,054 |
| 2016 | $33,048 | $22,866 |
| 2017 | $32,430 | $21,811 |
| 2018 | $32,430 | $21,691 |
| 2019 | $35,371 | $25,007 |
| 2020 | $35,704 | $25,340 |
| 2021* | $36,040 | $25,201 |
| 2022* | $36,378 | $25,062 |
| 2023* | $36,720 | $24,924 |
| 2024* | $37,066 | $24,787 |
| 2025* | $37,414 | $24,651 |