| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,922 | $27,423 |
| 2016 | $30,668 | $26,107 |
| 2017 | $30,454 | $25,539 |
| 2018 | $30,454 | $24,783 |
| 2019 | $31,674 | $26,226 |
| 2020 | $33,170 | $27,722 |
| 2021* | $33,996 | $27,118 |
| 2022* | $34,842 | $26,526 |
| 2023* | $35,710 | $25,948 |
| 2024* | $36,599 | $25,383 |
| 2025* | $37,511 | $24,829 |
