| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $43,591 | $22,384 |
| 2016 | $44,788 | $23,140 |
| 2017 | $45,619 | $23,572 |
| 2018 | $45,619 | $21,020 |
| 2019 | $48,375 | $20,394 |
| 2020 | $49,573 | $21,592 |
| 2021* | $50,802 | $21,996 |
| 2022* | $52,062 | $22,407 |
| 2023* | $53,353 | $22,826 |
| 2024* | $54,677 | $23,253 |
| 2025* | $56,033 | $23,688 |