| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $19,156 | $13,416 |
| 2016 | $19,632 | $13,897 |
| 2017 | $20,418 | $13,863 |
| 2018 | $20,418 | $13,728 |
| 2019 | $22,191 | $12,345 |
| 2020 | $21,733 | $11,887 |
| 2021* | $22,272 | $11,772 |
| 2022* | $22,824 | $11,658 |
| 2023* | $23,390 | $11,544 |
| 2024* | $23,970 | $11,432 |
| 2025* | $24,565 | $11,322 |
