| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $36,328 | $33,137 |
| 2016 | $36,924 | $32,200 |
| 2017 | $37,892 | $30,803 |
| 2018 | $37,892 | $32,983 |
| 2019 | $39,308 | $32,071 |
| 2020 | $39,860 | $32,623 |
| 2021* | $40,514 | $31,719 |
| 2022* | $41,178 | $30,841 |
| 2023* | $41,853 | $29,986 |
| 2024* | $42,540 | $29,156 |
| 2025* | $43,238 | $28,348 |