| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,580 | $24,897 |
| 2016 | $27,516 | $25,775 |
| 2017 | $28,760 | $26,889 |
| 2018 | $28,760 | $26,714 |
| 2019 | $31,446 | $30,018 |
| 2020 | $22,546 | $21,118 |
| 2021* | $23,340 | $21,863 |
| 2022* | $24,161 | $22,635 |
| 2023* | $25,012 | $23,434 |
| 2024* | $25,892 | $24,261 |
| 2025* | $26,803 | $25,118 |