| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $34,377 | $17,194 |
| 2016 | $34,967 | $17,856 |
| 2017 | $35,729 | $17,206 |
| 2018 | $35,729 | $17,039 |
| 2019 | $35,935 | $16,248 |
| 2020 | $37,651 | $17,964 |
| 2021* | $38,299 | $17,790 |
| 2022* | $38,957 | $17,617 |
| 2023* | $39,627 | $17,446 |
| 2024* | $40,309 | $17,277 |
| 2025* | $41,002 | $17,109 |