| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,135 | $15,316 |
| 2016 | $25,058 | $15,398 |
| 2017 | $25,908 | $16,581 |
| 2018 | $25,908 | $16,536 |
| 2019 | $27,041 | $18,144 |
| 2020 | $27,749 | $18,852 |
| 2021* | $28,690 | $19,587 |
| 2022* | $29,662 | $20,351 |
| 2023* | $30,668 | $21,145 |
| 2024* | $31,707 | $21,969 |
| 2025* | $32,782 | $22,826 |
