| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,536 | $17,137 |
| 2016 | $31,146 | $17,722 |
| 2017 | $31,985 | $18,477 |
| 2018 | $31,985 | $18,570 |
| 2019 | $32,721 | $19,605 |
| 2020 | $32,297 | $19,181 |
| 2021* | $32,943 | $19,835 |
| 2022* | $33,602 | $20,511 |
| 2023* | $34,274 | $21,211 |
| 2024* | $34,959 | $21,934 |
| 2025* | $35,658 | $22,682 |