| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,644 | $14,766 |
| 2016 | $20,040 | $14,891 |
| 2017 | $20,686 | $15,551 |
| 2018 | $20,686 | $15,470 |
| 2019 | $21,356 | $15,604 |
| 2020 | $21,571 | $15,819 |
| 2021* | $22,007 | $15,957 |
| 2022* | $22,451 | $16,095 |
| 2023* | $22,905 | $16,235 |
| 2024* | $23,367 | $16,377 |
| 2025* | $23,839 | $16,519 |