| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $43,603 | $24,161 |
| 2016 | $44,333 | $24,132 |
| 2017 | $44,921 | $22,252 |
| 2018 | $44,921 | $21,259 |
| 2019 | $45,954 | $19,698 |
| 2020 | $47,074 | $20,818 |
| 2021* | $47,860 | $19,890 |
| 2022* | $48,659 | $19,002 |
| 2023* | $49,472 | $18,155 |
| 2024* | $50,298 | $17,345 |
| 2025* | $51,138 | $16,572 |