| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,248 | $24,038 |
| 2016 | $31,680 | $21,823 |
| 2017 | $32,855 | $22,123 |
| 2018 | $32,855 | $21,205 |
| 2019 | $35,352 | $23,512 |
| 2020 | $35,768 | $23,928 |
| 2021* | $36,262 | $24,256 |
| 2022* | $36,762 | $24,588 |
| 2023* | $37,269 | $24,925 |
| 2024* | $37,784 | $25,266 |
| 2025* | $38,305 | $25,613 |