| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,673 | $15,702 |
| 2016 | $24,032 | $16,060 |
| 2017 | $24,178 | $16,392 |
| 2018 | $24,178 | $15,998 |
| 2019 | $23,968 | $15,593 |
| 2020 | $26,016 | $17,641 |
| 2021* | $26,175 | $18,006 |
| 2022* | $26,334 | $18,379 |
| 2023* | $26,495 | $18,759 |
| 2024* | $26,657 | $19,148 |
| 2025* | $26,819 | $19,544 |
