| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,709 | $22,095 |
| 2016 | $30,571 | $23,594 |
| 2017 | $31,782 | $24,545 |
| 2018 | $31,782 | $22,838 |
| 2019 | $33,283 | $23,626 |
| 2020 | $33,798 | $24,141 |
| 2021* | $34,778 | $24,974 |
| 2022* | $35,787 | $25,835 |
| 2023* | $36,825 | $26,727 |
| 2024* | $37,892 | $27,649 |
| 2025* | $38,991 | $28,603 |