| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,634 | $15,950 |
| 2016 | $24,087 | $17,083 |
| 2017 | $26,642 | $19,628 |
| 2018 | $26,642 | $19,870 |
| 2019 | $25,248 | $17,729 |
| 2020 | $27,458 | $19,939 |
| 2021* | $27,985 | $21,355 |
| 2022* | $28,523 | $22,871 |
| 2023* | $29,070 | $24,495 |
| 2024* | $29,628 | $26,234 |
| 2025* | $30,197 | $28,096 |
