| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,883 | $21,592 |
| 2016 | $27,500 | $22,049 |
| 2017 | $30,068 | $23,774 |
| 2018 | $30,068 | $23,817 |
| 2019 | $29,088 | $22,771 |
| 2020 | $30,024 | $23,707 |
| 2021* | $30,715 | $24,210 |
| 2022* | $31,421 | $24,723 |
| 2023* | $32,144 | $25,247 |
| 2024* | $32,883 | $25,782 |
| 2025* | $33,639 | $26,329 |