| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $31,393 | $22,464 |
| 2016 | $29,215 | $19,807 |
| 2017 | $30,178 | $20,768 |
| 2018 | $30,178 | $20,391 |
| 2019 | $31,034 | $21,719 |
| 2020 | $31,442 | $22,127 |
| 2021* | $31,854 | $22,543 |
| 2022* | $32,271 | $22,967 |
| 2023* | $32,694 | $23,399 |
| 2024* | $33,122 | $23,838 |
| 2025* | $33,556 | $24,287 |