| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $13,661 | $4,154 |
| 2016 | $13,730 | $3,145 |
| 2017 | $14,036 | $3,969 |
| 2018 | $14,036 | $3,296 |
| 2019 | $13,496 | $4,305 |
| 2020 | $14,393 | $5,202 |
| 2021* | $14,466 | $6,286 |
| 2022* | $14,540 | $7,596 |
| 2023* | $14,614 | $9,179 |
| 2024* | $14,689 | $11,092 |
| 2025* | $14,764 | $13,404 |
