| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,435 | $25,229 |
| 2016 | $30,524 | $25,043 |
| 2017 | $31,306 | $24,719 |
| 2018 | $31,306 | $24,995 |
| 2019 | $32,814 | $24,802 |
| 2020 | $33,153 | $25,141 |
| 2021* | $33,494 | $24,955 |
| 2022* | $33,839 | $24,770 |
| 2023* | $34,188 | $24,587 |
| 2024* | $34,540 | $24,405 |
| 2025* | $34,896 | $24,224 |
