| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,821 | $9,470 |
| 2016 | $17,804 | $12,388 |
| 2017 | $17,822 | $12,370 |
| 2018 | $17,822 | $12,382 |
| 2019 | $19,950 | $13,979 |
| 2020 | $23,450 | $17,479 |
| 2021* | $26,250 | $19,734 |
| 2022* | $29,384 | $22,279 |
| 2023* | $32,893 | $25,153 |
| 2024* | $36,820 | $28,398 |
| 2025* | $41,216 | $32,062 |